docs: switch to latest mkdocs-material docker image

.github/workflows/docs.yml

@@ -16,8 +16,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
       - name: Deploy docs
-        uses: mhausenblas/mkdocs-deploy-gh-pages@master
-        # Or use mhausenblas/mkdocs-deploy-gh-pages@nomaterial to build without the mkdocs-material theme
+        uses: asvarga/mkdocs-deploy-gh-pages@master
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           CONFIG_FILE: mkdocs.yml