deps(example): Bump the dependencies group

Bumps the dependencies group in /examples/nextjs-14-app-dir-rl with 2 updates: [@types/react-dom](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/react-dom) and [postcss](https://github.com/postcss/postcss).


Updates `@types/react-dom` from 18.2.18 to 18.2.19
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/react-dom)

Updates `postcss` from 8.4.34 to 8.4.35
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.34...8.4.35)

---
updated-dependencies:
- dependency-name: "@types/react-dom"
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dependencies
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dependencies
...

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