Update publish workflow

.github/workflows/mkdocs.yml

@@ -11,17 +11,10 @@ jobs:
     steps:
       - name: Checkout master
         uses: actions/checkout@v2
-      - name: Set up Python 3.8
-        uses: actions/setup-python@v2
-        with:
-          python-version: 3.8
-      - name: Install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install mkdocs-material
       - name: Build and Deploy Documentation using MkDocs
-        uses: Tangerine-Community/tangy-mkdocs-build-action@v1
+        uses: mhausenblas/mkdocs-deploy-gh-pages@master
         env:
           GITHUB_TOKEN: ${{ secrets.PERSONAL_TOKEN }}
           CUSTOM_DOMAIN: docs.portainer.io
+          CONFIG_FILE: mkdocs.yml
           MKDOCS_VERSION: 1.1.2