ci(workflows): skip PR coverage comment on forked pull requests

Author: thepastaclaw

.github/workflows/tests-rs-sdk-grpc-coverage.yml

@@ -76,7 +76,7 @@ jobs:
           path: grpc-coverage-report.txt
 
       - name: Comment PR
-        if: github.event_name == 'pull_request' && (steps.coverage.outputs.cache_modified == 'true' || steps.coverage.outputs.status == 'failure')
+        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository && (steps.coverage.outputs.cache_modified == 'true' || steps.coverage.outputs.status == 'failure')
         uses: actions/github-script@v7
         with:
           script: |
@@ -120,4 +120,4 @@ jobs:
 
       - name: Fail if new queries are missing
         if: steps.coverage.outputs.status == 'failure'
-        run: exit 1
+        run: exit 1