Bump json5 and @angular-devkit/build-angular in /getting-started

Bumps [json5](https://github.com/json5/json5) to 2.2.3 and updates ancestor dependency [@angular-devkit/build-angular](https://github.com/angular/angular-cli). These dependencies need to be updated together.


Updates `json5` from 0.5.1 to 2.2.3
- [Release notes](https://github.com/json5/json5/releases)
- [Changelog](https://github.com/json5/json5/blob/main/CHANGELOG.md)
- [Commits](json5/json5@v0.5.1...v2.2.3)

Updates `@angular-devkit/build-angular` from 0.10.7 to 15.1.2
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular-cli/commits/15.1.2)

---
updated-dependencies:
- dependency-name: json5
  dependency-type: indirect
- dependency-name: "@angular-devkit/build-angular"
  dependency-type: direct:development
...

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Author: dependabot[bot]