build(deps-dev): bump phpunit/phpunit from 11.5.42 to 12.5.8

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 11.5.42 to 12.5.8.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/12.5.8/ChangeLog-12.5.md)
- [Commits](sebastianbergmann/phpunit@11.5.42...12.5.8)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-version: 12.5.8
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

composer.json

@@ -3,7 +3,7 @@
     "description": "A Raspberry Pi jukebox, playing local music, podcasts, web radio and streams triggered by RFID cards, web app or home automation. All plug and play via USB. GPIO scripts available.",
     "type": "project",
     "require-dev": {
-        "phpunit/phpunit": "^11",
+        "phpunit/phpunit": "^12",
         "php-mock/php-mock-phpunit": "^2"
     },
     "license": "MIT",