Fix broken-changes action for fork PRs (#1908)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: asmyasnikov <14202262+asmyasnikov@users.noreply.github.com>
Co-authored-by: Aleksey Myasnikov <asmyasnikov@ydb.tech>
Co-authored-by: Konstantin Prokopenko <kprokopenko@users.noreply.github.com>

Author: 3 people

.github/workflows/breaking.yml

@@ -27,8 +27,9 @@ jobs:
         run: gorelease -base=$GITHUB_BASE_REF 2>&1 > changes.txt | true
       - name: Print API changes
         run: cat changes.txt
+      # Skip comment for forks - GITHUB_TOKEN doesn't have write permissions for external PRs
       - name: Comment Report
-        if: always()
+        if: always() && github.event.pull_request.head.repo.full_name == github.repository
         uses: marocchino/sticky-pull-request-comment@v2
         with:
           path: changes.txt