Bump phpstan/phpstan-doctrine from 1.5.0 to 1.5.1

Bumps [phpstan/phpstan-doctrine](https://github.com/phpstan/phpstan-doctrine) from 1.5.0 to 1.5.1.
- [Release notes](https://github.com/phpstan/phpstan-doctrine/releases)
- [Commits](phpstan/phpstan-doctrine@1.5.0...1.5.1)

---
updated-dependencies:
- dependency-name: phpstan/phpstan-doctrine
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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