Changed to mkdocs-material insiders, rss icon bug fix

.github/workflows/ci.yml

@@ -24,6 +24,10 @@ jobs:
           path: .cache
           restore-keys: |
             mkdocs-material-
+      - run: apt-get install pngquant 
+      - run: pip install git+https://${GH_TOKEN}@github.com/squidfunk/mkdocs-material-insiders.git
       - run: pip install -r requirements.txt
       - run: playwright install chromium --with-deps 
       - run: mkdocs gh-deploy --force
+env:
+  GH_TOKEN: ${{ secrets.GH_TOKEN }}