chore(deps): bump doctrine/orm in the doctrine group across 1 directory

Bumps the doctrine group with 1 update in the / directory: [doctrine/orm](https://github.com/doctrine/orm).


Updates `doctrine/orm` from 3.6.2 to 3.6.8
- [Release notes](https://github.com/doctrine/orm/releases)
- [Commits](doctrine/orm@3.6.2...3.6.8)

---
updated-dependencies:
- dependency-name: doctrine/orm
  dependency-version: 3.6.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: doctrine
...

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Author: dependabot[bot]