Add playground

.github/workflows/docs.yml

@@ -35,4 +35,4 @@ jobs:
           python docs/_static/playground_whl.py
           git config user.name 'github-actions[bot]' && git config user.email 'github-actions[bot]@users.noreply.github.com'
       - name: Deploy to GH Pages
-        run: mkdocs gh-deploy
+        run: python -m mkdocs gh-deploy

.readthedocs.yaml

@@ -11,7 +11,7 @@ build:
   tools:
     python: "3.8"
   jobs:
-    pre_create_environment:
+    pre_build:
       - python docs/_static/playground_whl.py
 
 # Build documentation in the docs/ directory with Sphinx