Run PHP CodeSniffer on PHP 8.1 (#9317)

Author: derrabus

.github/workflows/coding-standard.yml

@@ -12,4 +12,4 @@ jobs:
   coding-standards:
     uses: "doctrine/.github/.github/workflows/[email protected]"
     with:
-      php-version: "7.4"
+      php-version: "8.1"