ci: skip lint comment on fork PRs

.github/workflows/lint.yml

@@ -122,7 +122,8 @@ jobs:
           retention-days: 14
 
       - name: Post / update PR comment
-        if: github.event_name == 'pull_request'
+        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
+        continue-on-error: true
         uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7
         with:
           script: |