composer(deps-dev): Bump phpunit/phpunit from 10.5.19 to 10.5.20

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 10.5.19 to 10.5.20.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/10.5.20/ChangeLog-10.5.md)
- [Commits](sebastianbergmann/phpunit@10.5.19...10.5.20)

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

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

composer.json

@@ -35,7 +35,7 @@
     "nette/di": "^3.2.1",
     "phpstan/phpstan-deprecation-rules": "^1.1.4",
     "phpstan/phpstan-strict-rules": "^1.5.5",
-    "phpunit/phpunit": "^10.5.19",
+    "phpunit/phpunit": "^10.5.20",
     "psalm/plugin-phpunit": "~0.19.0",
     "psr/container": "^2.0.2",
     "rector/rector": "^1.0.4",