Doc 1570 update theme (#3444)

Co-authored-by: Justin Ellingwood <justin@n8n.io>

.github/workflows/build-test.yml

@@ -1,39 +0,0 @@
-name: Internal PR linkcheck
-on:
-  pull_request:
-    branches:
-      - main
-permissions:  
-  contents: read 
-  pull-requests: write
-jobs:
-  link-check:
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-      - name: Setup Python
-        uses: actions/setup-python@v2
-        with:
-          python-version: 3.12
-      - name: Install dependencies
-        run: |
-          python3 -m venv venv
-          source venv/bin/activate
-          pip install -r requirements.txt
-          pip install mkdocs-material
-      - name: Run mkdocs in strict mode
-        id: mkdocs
-        run: |
-          source venv/bin/activate
-          mkdocs build --config-file mkdocs-test.yml --strict 2>&1 | tee mkdocs.out
-          [[ $(tail -n 1 mkdocs.out) =~ ^Aborted ]] && exit 1 || exit 0
-
-      - name: PR comment with file
-        if: failure()
-        uses: thollander/actions-comment-pull-request@e4a76dd2b0a3c2027c3fd84147a67c22ee4c90fa # v3.0.1
-        with:
-          file-path: mkdocs.out
-          comment-tag: execution
-          mode: recreate