chore: Node.js 18/23 removal

[jennifer-shehane]

Goes with cypress-io/cypress#31409

[cypress]

cypress-documentation    Run #379

Run Properties:   Passed #379  •  c9eb7a3209: Merge branch 'release/15.0.0' into node-18-23-removal

Project	cypress-documentation
Branch Review	node-18-23-removal
Run status	Passed #379
Run duration	08m 15s
Commit	c9eb7a3209: Merge branch 'release/15.0.0' into node-18-23-removal
Committer	Jennifer Shehane
View all properties for this run ↗︎

---

Test results
Failures	0
Flaky	0
Pending	0
Skipped	0
Passing	301
View all changes introduced in this branch ↗︎

UI Coverage  10.95%
Untested elements	2393
Tested elements	3

Accessibility  96.89%
Failed rules	1 critical   4 serious   4 moderate   0 minor
Failed elements	27

[MikeMcC399]

If Node.js 18.x will no longer be supported. Node.js 20.x LTS becomes the lowest supported version.

The lowest 20.x LTS version is Node.js v20.9.0 which ships with npm 10.1.0. So this means that the npm version should be bumped from 8.6.0 to 10.1.0 to match.

cypress-documentation/docs/app/get-started/install-cypress.mdx

Line 144 in 0e8c8ae

| [npm](https://docs.npmjs.com/) | `8.6.0` and above | [Downloading and installing Node.js and npm](https://docs.npmjs.com/downloading-and-installing-node-js-and-npm) |

(Node.js v20.0.0 shipped with npm 9.6.4 but I don't think this needs to be considered because Node.js doesn't support older non-LTS releases.)

[jennifer-shehane]

@MikeMcC399 Thanks for the detailed review, as always! I updated the lowest npm version supported as well.

[MikeMcC399]

@jennifer-shehane

Thanks for the detailed review, as always! I updated the lowest npm version supported as well.

Thanks also for making the tweak!