chore: run closed issue message on PRs (#30892)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

.github/workflows/closed-issue-message.yml

@@ -2,6 +2,8 @@ name: Closed Issue Message
 on:
   issues:
     types: [closed]
+  pull_request_target:
+    types: [closed]
 jobs:
   auto_comment:
     permissions:
@@ -13,7 +15,6 @@ jobs:
         # These inputs are both required
         repo-token: "${{ secrets.GITHUB_TOKEN }}"
         message: |
-          ### ⚠️COMMENT VISIBILITY WARNING⚠️ 
-          Comments on closed issues are hard for our team to see. 
-          If you need more assistance, please either tag a team member or open a new issue that references this one.
+          Comments on closed issues and PRs are hard for our team to see. 
+          If you need help, please open a new issue that references this one.
           If you wish to keep having a conversation with other community members under this issue feel free to do so.