Fix CI failure in make old_version_tests (#1710)

Author: habema

.github/workflows/tests.yml

@@ -84,5 +84,7 @@ jobs:
  enable-cache: true
  - name: Install dependencies
  run: make sync
+ - name: Install Python 3.9 dependencies
+ run: UV_PROJECT_ENVIRONMENT=.venv_39 uv sync --all-extras --all-packages --group dev
  - name: Run tests
  run: make old_version_tests