Update ci.yml

added literate-nav & section-index plugins for mkdocs

Author: idmac75

.github/workflows/ci.yml

@@ -15,4 +15,6 @@ jobs:
       - run: pip install mkdocs-material
       - run: pip install pymdown-extensions
       - run: pip install mkdocs-glightbox
+      - run: pip install mkdocs-section-index
+      - run: pip install mkdocs-literate-nav
       - run: mkdocs gh-deploy --force