Disable PHP 8.1 until PHPC-1849 is resolved (#1241)

Author: jmikola

.github/workflows/tests.yml

@@ -23,7 +23,8 @@ jobs:
         php-version:
           - "7.4"
           - "8.0"
-          - "8.1"
+          # Re-enable after PHPC-1849 is resolved
+          # - "8.1"
         mongodb-version:
           - "4.4"
         topology: