chore(deps): bump the production-dependencies group across 1 directory with 14 updates

Bumps the production-dependencies group with 14 updates in the /backend directory:

| Package | From | To |
| --- | --- | --- |
| [@octokit/core](https://github.com/octokit/core.js) | `6.1.4` | `7.0.3` |
| [cron](https://github.com/kelektiv/node-cron) | `4.1.3` | `4.3.3` |
| [dayjs](https://github.com/iamkun/dayjs) | `1.11.13` | `1.11.18` |
| [dotenv](https://github.com/motdotla/dotenv) | `16.4.7` | `17.2.2` |
| [eventsource](https://github.com/EventSource/eventsource) | `3.0.6` | `4.0.0` |
| [express](https://github.com/expressjs/express) | `4.21.2` | `5.1.0` |
| [@types/express](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/express) | `4.17.21` | `5.0.3` |
| [express-rate-limit](https://github.com/express-rate-limit/express-rate-limit) | `7.5.0` | `8.1.0` |
| [mongoose](https://github.com/Automattic/mongoose) | `8.13.2` | `8.18.1` |
| [mysql2](https://github.com/sidorares/node-mysql2) | `3.14.0` | `3.14.5` |
| [octokit](https://github.com/octokit/octokit.js) | `4.1.2` | `5.0.3` |
| [smee-client](https://github.com/probot/smee-client) | `3.1.1` | `4.3.1` |
| [validator](https://github.com/validatorjs/validator.js) | `13.15.0` | `13.15.15` |
| [@types/validator](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/validator) | `13.15.0` | `13.15.3` |



Updates `@octokit/core` from 6.1.4 to 7.0.3
- [Release notes](https://github.com/octokit/core.js/releases)
- [Commits](octokit/core.js@v6.1.4...v7.0.3)

Updates `cron` from 4.1.3 to 4.3.3
- [Release notes](https://github.com/kelektiv/node-cron/releases)
- [Changelog](https://github.com/kelektiv/node-cron/blob/main/CHANGELOG.md)
- [Commits](kelektiv/node-cron@v4.1.3...v4.3.3)

Updates `dayjs` from 1.11.13 to 1.11.18
- [Release notes](https://github.com/iamkun/dayjs/releases)
- [Changelog](https://github.com/iamkun/dayjs/blob/v1.11.18/CHANGELOG.md)
- [Commits](iamkun/dayjs@v1.11.13...v1.11.18)

Updates `dotenv` from 16.4.7 to 17.2.2
- [Changelog](https://github.com/motdotla/dotenv/blob/master/CHANGELOG.md)
- [Commits](motdotla/dotenv@v16.4.7...v17.2.2)

Updates `eventsource` from 3.0.6 to 4.0.0
- [Release notes](https://github.com/EventSource/eventsource/releases)
- [Changelog](https://github.com/EventSource/eventsource/blob/main/CHANGELOG.md)
- [Commits](EventSource/eventsource@v3.0.6...v4.0.0)

Updates `express` from 4.21.2 to 5.1.0
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@4.21.2...v5.1.0)

Updates `@types/express` from 4.17.21 to 5.0.3
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/express)

Updates `express-rate-limit` from 7.5.0 to 8.1.0
- [Release notes](https://github.com/express-rate-limit/express-rate-limit/releases)
- [Commits](express-rate-limit/express-rate-limit@v7.5.0...v8.1.0)

Updates `mongoose` from 8.13.2 to 8.18.1
- [Release notes](https://github.com/Automattic/mongoose/releases)
- [Changelog](https://github.com/Automattic/mongoose/blob/master/CHANGELOG.md)
- [Commits](Automattic/mongoose@8.13.2...8.18.1)

Updates `mysql2` from 3.14.0 to 3.14.5
- [Release notes](https://github.com/sidorares/node-mysql2/releases)
- [Changelog](https://github.com/sidorares/node-mysql2/blob/master/Changelog.md)
- [Commits](sidorares/node-mysql2@v3.14.0...v3.14.5)

Updates `octokit` from 4.1.2 to 5.0.3
- [Release notes](https://github.com/octokit/octokit.js/releases)
- [Commits](octokit/octokit.js@v4.1.2...v5.0.3)

Updates `smee-client` from 3.1.1 to 4.3.1
- [Release notes](https://github.com/probot/smee-client/releases)
- [Commits](probot/smee-client@v3.1.1...v4.3.1)

Updates `validator` from 13.15.0 to 13.15.15
- [Release notes](https://github.com/validatorjs/validator.js/releases)
- [Changelog](https://github.com/validatorjs/validator.js/blob/master/CHANGELOG.md)
- [Commits](validatorjs/validator.js@13.15.0...13.15.15)

Updates `@types/validator` from 13.15.0 to 13.15.3
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/validator)

---
updated-dependencies:
- dependency-name: "@octokit/core"
  dependency-version: 7.0.3
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: production-dependencies
- dependency-name: cron
  dependency-version: 4.3.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: production-dependencies
- dependency-name: dayjs
  dependency-version: 1.11.18
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: production-dependencies
- dependency-name: dotenv
  dependency-version: 17.2.2
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: production-dependencies
- dependency-name: eventsource
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: production-dependencies
- dependency-name: express
  dependency-version: 5.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: production-dependencies
- dependency-name: "@types/express"
  dependency-version: 5.0.3
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: production-dependencies
- dependency-name: express-rate-limit
  dependency-version: 8.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: production-dependencies
- dependency-name: mongoose
  dependency-version: 8.18.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: production-dependencies
- dependency-name: mysql2
  dependency-version: 3.14.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: production-dependencies
- dependency-name: octokit
  dependency-version: 5.0.3
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: production-dependencies
- dependency-name: smee-client
  dependency-version: 4.3.1
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: production-dependencies
- dependency-name: validator
  dependency-version: 13.15.15
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: production-dependencies
- dependency-name: "@types/validator"
  dependency-version: 13.15.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: production-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]