build(deps-dev): bump phpunit/phpunit from 9.5.28 to 9.6.33

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 9.5.28 to 9.6.33.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/9.6.33/ChangeLog-9.6.md)
- [Commits](sebastianbergmann/phpunit@9.5.28...9.6.33)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-version: 9.6.33
  dependency-type: direct:development
...

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

Author: dependabot[bot]

composer.json

@@ -33,7 +33,7 @@
         "mediawiki/minus-x": "^1.1.1",
         "squizlabs/php_codesniffer": "~3.7.2",
         "php-parallel-lint/php-parallel-lint": "^1.3.2",
-        "phpunit/phpunit": "~9.5.28",
+        "phpunit/phpunit": "~9.6.33",
         "phpunit/phpunit-selenium": "~9.0.1",
         "simpletest/simpletest": "^1.1"
     },