Merge pull request #2978 from thekad/add-ga-label

Allow regular folks to label something as GA

Author: openshift-merge-robot

cluster/ci/config/prow/plugins.yaml

@@ -937,6 +937,7 @@ sigmention:
 label:
   additional_labels:
   - do-not-merge/needs-signoff
+  - ga
 
 external_plugins:
   cri-o: