fix(ci): add timeout to benchmark step

If there are certain errors running the scene (e.g. script errors),
Godot will log the error but never quit, meaning the step will continue
to run indefinitely. This adds a 2 minute timeout to prevent that.

.github/workflows/main.yml

@@ -370,6 +370,7 @@ jobs:
         if: steps.wait-for-build.outputs.conclusion == 'success'
         shell: bash
         run: just bench ${{matrix.benchmark}}
+        timeout-minutes: 2
       - name: Upload results
         uses: actions/upload-artifact@v4
         with: