Add scripts/dev/credits to 'verify-generated-files' action (#9049)

see 3292e54

Author: TimWolla

.github/actions/verify-generated-files/action.yml

@@ -6,6 +6,7 @@ runs:
       run: |
         set -x
         [[ "$OSTYPE" == "darwin"* ]] && export PATH="/usr/local/opt/bison/bin:$PATH"
+        scripts/dev/credits
         scripts/dev/genfiles
         Zend/zend_vm_gen.php
         build/gen_stub.php -f