Update .github/workflows/main.yml

Co-authored-by: Cristian Le <[email protected]>

.github/workflows/main.yml

@@ -77,7 +77,9 @@ jobs:
           # use the latest stable version
           python-version: "3.x"
           cache: "pip"
-      - run: pip install -r docs/requirements.txt
+     # `pybtex` uses `pkg_resources` which is deprecated. Use workaround until upstream `mkdocs_bibtext`decides on a solution
+     # https://bitbucket.org/pybtex-devs/pybtex/issues/169/replace-pkg_resources-with
+      - run: pip install -r docs/requirements.txt setuptools
       - run: mkdocs build --strict
         working-directory: ./docs
         env: