skip comment on PR

Author: zirain

.github/workflows/build.yaml

@@ -43,6 +43,7 @@ jobs:
           local-only: true
 
       - name: Comment on PR
+        if: github.event_name == 'pull_request'
         uses: thollander/actions-comment-pull-request@v3
         with:
           comment-tag: failure
@@ -66,6 +67,7 @@ jobs:
           github-token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Comment on PR
+        if: github.event_name == 'pull_request'
         uses: thollander/actions-comment-pull-request@v3
         with:
           comment-tag: hybrid-failure