Bump php-actions/phpunit from 3 to 9
Bump php-actions/phpunit from 3 to 9

Bumps [php-actions/phpunit](https://github.com/php-actions/phpunit) from 3 to 9.
- [Release notes](https://github.com/php-actions/phpunit/releases)
- [Commits](https://github.com/php-actions/phpunit/compare/v3...v9)

---
updated-dependencies:
- dependency-name: php-actions/phpunit
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
cmbuckley/letterboxd-ics,cmbuckley/letterboxd-ics