[ci] include checkout step in claude review workflow (#13352)

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Author: sayakpaul

.github/workflows/claude_review.yml

@@ -32,6 +32,9 @@ jobs:
       )
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
       - uses: anthropics/claude-code-action@v1
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}