switch to using public mkdocs for check docs step (#1645)

* switch to using public mkdocs for check docs step

* remove git config and pip calls for check docs

* fix label check filtering

Signed-off-by: Sebastian Malton <sebastian@malton.name>

.github/workflows/check-docs.yml

@@ -1,37 +1,20 @@
-name: Publish docs via GitHub Pages
+name: Check Documentation
 on:
   - pull_request
 jobs:
   build:
     name: Check Docs
     runs-on: ubuntu-latest
-    if: github.event.label.name != 'area/documentation'
+    if: ${{ contains(github.event.pull_request.labels.*.name, 'area/documentation') }}
     strategy:
       matrix:
         node-version: [12.x]
     steps:
-      - name: Set up Python 3.7
-        uses: actions/setup-python@v2
-        with:
-          python-version: '3.x'
-
-      - name: Install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install git+https://${{ secrets.GH_TOKEN }}@github.com/lensapp/mkdocs-material-insiders.git
-          pip install mike
-
-
       - name: Checkout Release from lens
         uses: actions/checkout@v2
         with:
           fetch-depth: 0
 
-      - name: git config
-        run: |
-           git config --local user.email "action@github.com"
-           git config --local user.name "GitHub Action"
-
       - name: Using Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v1
         with: