infra: PHP 8.1 no longer supported

Author: dkarlovi

.github/workflows/build.yaml

@@ -11,7 +11,7 @@ jobs:
             PHP_VERSION: ${{ matrix.php }}
         strategy:
             matrix:
-                php: [ "8.1", "8.2", "8.3" ]
+                php: [ "8.2", "8.3" ]
         steps:
             -
                 name: Repo checkout