Add temporary pin on pytoolconfig to fix pip check

Author: krassowski

requirements/github-actions.yml

@@ -34,6 +34,9 @@ dependencies:
   # test tools
   - pytest-asyncio
   - pytest-cov
+  # temporary pin added on 2022-12-28, if editing this file try to remove it:
+  # pytoolconfig 1.2.4 depends on packaging>=22.0 which breaks `pip check`
+  - pytoolconfig <1.2.4
   # see https://github.com/conda-forge/pytest-flake8-feedstock/issues/20
   # and https://github.com/tholo/pytest-flake8/issues/86
   - pytest-flake8 <1.1.1