temp: allow BlackDuck Polaris SAST scan on pull_request events for ruby-erlang testing

Author: shanmugapriya-tr

.github/workflows/ci-main-pull-request.yml

@@ -1317,7 +1317,7 @@ jobs:
 
   BlackDuck-Polaris-SAST:
     name: 'BlackDuck Polaris SAST scan'
-    if: ${{ inputs.perform-blackduck-polaris && github.event_name == 'push' }}
+    if: ${{ inputs.perform-blackduck-polaris && (github.event_name == 'push' || github.event_name == 'pull_request') }} # TODO: revert to 'push' only after ruby-erlang testing is complete
     uses: chef/common-github-actions/.github/workflows/polaris-sast.yml@main
     needs: checkout
     secrets: inherit