Add lecture-python-intro.myst as test repo

Author: mmcky

config.yml

@@ -14,6 +14,7 @@ backup:
     - "sphinx-tojupyter"        # Test repo
     - "lecture-wasm"            # Test repo
     - "lecture-python-advanced.myst"  # Test repo (large lecture site)
+    - "lecture-python-intro.myst"     # Test repo (large lecture site)
 
   # Repository name patterns (Python regex)
   patterns: