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] <support@github.com>

composer.json

@@ -51,7 +51,7 @@
     "ext-xmlwriter": "*",
     "infection/infection": "^0.28.1",
     "mikey179/vfsstream": "^1.6.11",
-    "mimmi20/coding-standard": "^5.2.26",
+    "mimmi20/coding-standard": "^5.2.28",
     "nikic/php-parser": "^v4.19.1 || ^5.0.2",
     "phpstan/extension-installer": "^1.3.1",
     "phpstan/phpstan": "^1.10.67",