Resolve Copilot's review:

Do not require phpcompatibility/php-compatibility. magento/magento-coding-standard
  pulls magento/php-compatibility-fork, which declares
  `replace: phpcompatibility/php-compatibility`, so the real package can never be
  installed and the entry only implied otherwise. The php-compat CI job installs
  the real sniffs in an isolated directory instead

Author: prahimi94

.github/workflows/action.yml

@@ -182,10 +182,10 @@ jobs:
         name: composer-zip-archive
         path: archive.zip
 
-  # Magento 2.4.8 pins php to ~8.2.0||~8.3.0||~8.4.0, so a normal install cannot
-  # run on 8.5 yet. This lane installs with the platform requirement ignored and
-  # only runs PHPCompatibility, which parses source and never executes Magento,
-  # so the module stays verified 8.5-clean ahead of Magento allowing 8.5.
+  # Magento 2.4.8 pins php to ~8.2.0||~8.3.0||~8.4.0, so a normal Magento install cannot
+  # run on 8.5 yet. This lane runs on PHP 8.5 without installing Magento; it only lints the
+  # repository and runs PHPCompatibility in an isolated directory to keep the module 8.5-clean
+  # ahead of Magento allowing 8.5.
   php-compat:
     name: PHP 8.2-8.5 Compatibility
     runs-on: ubuntu-latest

composer.json

@@ -11,7 +11,6 @@
     "magento/magento-coding-standard": "^38",
     "phan/phan": "^6.0",
     "phpmd/phpmd": "^2.15",
-    "phpcompatibility/php-compatibility": "^10.0@alpha",
     "drenso/phan-extensions": "^3.5",
     "phing/phing": "^3.0",
     "squizlabs/php_codesniffer": "^3.13",