Install only docs for the documentation building

.github/workflows/deploy-docs.yml

@@ -28,11 +28,9 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: 3.x
-          cache: "poetry"
-          cache-dependency-path: poetry.lock
 
       - name: Install dependencies
-        run: poetry install --no-root --group=docs
+        run: poetry install --only docs
 
       - name: Deploy docs
         run: poetry run mkdocs gh-deploy --force