fix docs issues

Author: stefdoerr

.github/workflows/docs.yml

@@ -34,6 +34,8 @@ jobs:
           conda install -y -q --file extra_requirements.txt nbconvert sphinx=6.1.3 python=3.9
           pip install pydata-sphinx-theme==0.13.1 sphinx-argparse sphinx-notfound-page sphinx-sitemap
           pip install .
+          # pdb2pqr is downgrading docutils for some reason and causes failures
+          pip install docutils==0.19
 
       - name: Generate rst docs
         run: |