add token to action for test plan comment (RedHatQE#2281)

Author: rnetser

.github/workflows/request-coderabbit-test-instructions.yml

@@ -31,6 +31,7 @@ jobs:
         uses: peter-evans/create-or-update-comment@v4
         with:
           issue-number: ${{ github.event.pull_request.number }}
+          token: ${{ secrets.BOT3_TOKEN }}
           body: |
             @coderabbitai
             <details>