fix: make PR comment step optional in performance workflow

The PR comment step can fail when running on pull requests from forks
due to GitHub's security restrictions. Even with write permissions
specified, GITHUB_TOKEN is read-only for fork PRs to prevent malicious
code from writing to the base repository.

Added 'continue-on-error: true' to make this step optional. The
performance results will still be available in the workflow artifacts
even if commenting fails.

Fixes the '403 Resource not accessible by integration' error on fork PRs.

Signed-off-by: Senan Zedan <[email protected]>

Author: szedan-rh

.github/workflows/performance-test.yml

@@ -127,6 +127,7 @@ jobs:
 
       - name: Comment PR with results
         if: github.event_name == 'pull_request'
+        continue-on-error: true  # May fail for PRs from forks due to GitHub security restrictions
         uses: actions/github-script@v7
         with:
           script: |