Run deployment only from protected branches

.gitlab-ci.yml

@@ -45,4 +45,7 @@ dags_rsync_community:
   stage: deploy
   script:
     - gcloud auth activate-service-account --key-file $OSDU_GCP_SVC_ACCT
-    - gsutil -m rsync -x "\.git.*|tests/.*|plugins/tests.*$" -r "$PWD" $OSDU_GCP_DEPL_TARGET
\ No newline at end of file
+    - gsutil -m rsync -x "\.git.*|tests/.*|plugins/tests.*$" -r "$PWD" $
+  only:
+    variables:
+        - $CI_COMMIT_REF_PROTECTED
\ No newline at end of file