fix canary w/ fetch depth

Author: acao

.github/workflows/pr.yml

@@ -206,6 +206,8 @@ jobs:
     if: github.event.pull_request.head.repo.full_name == github.repository
     steps:
       - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
       - uses: actions/setup-node@v3
         with:
           node-version: 16