Use javascript not shell

* Revert "Fail workflow when pr includes unallowed contributions (#17333)"

This reverts commit 871d886.

* actually use javascript

* remove space

* lint

Author: rachmari

.github/workflows/triage-unallowed-contributions.yml

@@ -104,7 +104,8 @@ jobs:
               body: reviewMessage,
               event: 'REQUEST_CHANGES'
             })
-            exit 1 # prevents further steps from running and fails workflow
+
+            core.setFailed("It looks like you've modified some files we don't accept contributions for. Please see the review with requested changes for details.")
       # When the most recent review was CHANGES_REQUESTED and the existing
       # PR no longer contains unallowed changes, dismiss the previous review
       - name: Dismiss pull request review