composer(deps-dev): update mimmi20/coding-standard requirement

Updates the requirements on [mimmi20/coding-standard](https://github.com/mimmi20/coding-standard) to permit the latest version.

Updates `mimmi20/coding-standard` to 5.2.28
- [Release notes](https://github.com/mimmi20/coding-standard/releases)
- [Commits](mimmi20/coding-standard@5.2.26...5.2.28)

---
updated-dependencies:
- dependency-name: mimmi20/coding-standard
  dependency-type: direct:development
  dependency-group: minor-patch-dependencies
...

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

composer.json

@@ -33,7 +33,7 @@
     "infection/infection": "^0.27.11",
     "laminas/laminas-modulemanager": "^2.15.0",
     "laminas/laminas-servicemanager": "^3.22.1 || ^4.0.0",
-    "mimmi20/coding-standard": "^5.2.26",
+    "mimmi20/coding-standard": "^5.2.28",
     "nikic/php-parser": "^v4.19.1",
     "phpstan/extension-installer": "^1.3.1",
     "phpstan/phpstan": "^1.10.67",