Use manual doc check

Conflicts:
	.github/workflows/docs.yml

.github/workflows/docs.yml

@@ -9,23 +9,23 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: dorny/paths-filter@v2
+      - name: Check if docs changed
         id: changes
-        with:
-          filters: |
-            docs:
-              - 'docs/**'
+        run: |
+          git fetch origin main
+          git diff --quiet origin/main -- docs
+          echo ::set-output name=docs::$(test $? -ne 0 && echo 'true' || echo 'false')
       - uses: actions/setup-python@v2
-        if: steps.changes.outputs.src == 'true'
+        if: steps.changes.outputs.docs == 'true'
         with:
           python-version: 3.x
       - name: Install Poetry
-        if: steps.changes.outputs.src == 'true'
+        if: steps.changes.outputs.docs == 'true'
         run: |
           pip install -U pip
           pip install poetry
           poetry config virtualenvs.create false
           poetry install --with docs
       - name: Deploy to GitHub Pages
-        if: steps.changes.outputs.src == 'true'
+        if: steps.changes.outputs.docs == 'true'
         run: poetry run mkdocs gh-deploy --force