Refactor

Author: tvdijen

.github/workflows/reusable_linter.yml

@@ -12,7 +12,7 @@ on:  # yamllint disable-line rule:truthy
         description: 'The PHP-version to use for linting'
         type: string
         required: false
-        default: ${{ env.php_supported_versions }}
+        default: ${{ toJSON(['8.1', '8.2', '8.3', '8.4']) }}
 
       enable_eslinter:
         description: 'Enable the ES-Linter for this repository'