fix the release doc dependency issue (#4828)

.github/workflows/release-docs.yml

@@ -29,6 +29,7 @@ jobs:
 
       - name: Install dependencies
         run: |
+          find /public_sglang_ci/runner-a-gpu-1/_work/_tool/Python/3.9.21/x64/lib/python3.9/site-packages -name "sgl-kernel*" -exec rm -rf {} + || true
           bash scripts/ci_install_dependency.sh
           pip install -r docs/requirements.txt
           apt-get update