Update readthedocs config

Author: cgoldberg

.readthedocs.yaml

@@ -7,7 +7,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "latest"
+    python: latest
     commands:
     - PYTHONPATH=py sphinx-autogen py/docs/source/api.rst
     - sphinx-build -b html -d build/docs/doctrees py/docs/source $READTHEDOCS_OUTPUT/html