Update anthropics/claude-code-action digest to 787c5a0 (#5374)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/claude.yml

@@ -59,7 +59,7 @@ jobs:
 
       - name: Run Claude Code
         id: claude
-        uses: anthropics/claude-code-action@51ea8ea73a139f2a74ff649e3092c25a904aed7e # v1
+        uses: anthropics/claude-code-action@787c5a0ce96a9a6cfb050ea0c8f4c05f2447c251 # v1
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           # Security: Restrict tools to prevent arbitrary code execution.