Add plugin for mkdocs

.github/workflows/ci.yml

@@ -17,6 +17,6 @@ jobs:
         with:
           key: ${{ github.ref }}
           path: .cache
-      - run: pip install mkdocs-material
+      - run: pip install mkdocs-material "mkdocstrings[python]"
       - run: pip install pillow cairosvg
       - run: mkdocs gh-deploy --force