build(deps): bump phpstan/phpdoc-parser in /backend

Bumps [phpstan/phpdoc-parser](https://github.com/phpstan/phpdoc-parser) from 1.29.1 to 1.30.0.
- [Release notes](https://github.com/phpstan/phpdoc-parser/releases)
- [Commits](phpstan/phpdoc-parser@1.29.1...1.30.0)

---
updated-dependencies:
- dependency-name: phpstan/phpdoc-parser
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>