fix: pin closed-issue-message to hash (#3905)

Author: reedham-aws

.github/workflows/close_issue_message.yml

@@ -9,7 +9,7 @@ jobs:
     permissions:
       issues: write
     steps:
-      - uses: aws-actions/closed-issue-message@v2
+      - uses: aws-actions/closed-issue-message@10aaf6366131b673a7c8b7742f8b3849f1d44f18 # v2
         with:
           # These inputs are both required
           repo-token: "${{ secrets.GITHUB_TOKEN }}"