ci: 💚 fix pkg_resources bug

try this: https://stackoverflow.com/questions/61232326/python-pip-no-module-named-pkg-resources

.github/workflows/ci.yml

@@ -36,6 +36,7 @@ jobs:
       - run: pip install mike
       - run: pip install mkdocs-exclude
       - run: pip install mkdocs-simple-hooks
+      - run: pip install setuptools
       - run: mkdocs gh-deploy --force
 env:
   GH_TOKEN: ${{ secrets.GH_TOKEN }}