Update ci.yml

Author: mieza-untref

.github/workflows/ci.yml

@@ -27,3 +27,5 @@ jobs:
             mkdocs-material-
       - run: pip install mkdocs-material 
       - run: mkdocs gh-deploy --force
+      - name: Install dependencies
+      - run: pip install mkdocs-material mkdocs-git-authors-plugin