wip(ci): use latest runner and staging

Author: not-matthias

.github/workflows/codspeed.yml

@@ -40,8 +40,10 @@ jobs:
       - name: Run benchmarks
         uses: CodSpeedHQ/action@main
         with:
+          runner-version: branch:cod-2105-support-memory-profiling-for-python
           mode: ${{ matrix.mode }}
           run: uv run pytest tests/benchmarks/ --codspeed --test-group=${{ matrix.shard }} --test-group-count=${{ env.SHARDS }}
+          upload-url: https://api.staging.preview.codspeed.io/upload
 
   all-checks:
     runs-on: ubuntu-latest