update readthedoc config

Author: kunwuz

docs/.readthedocs.yaml

@@ -2,21 +2,18 @@
 # Read the Docs configuration file
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
 
-# Required
 version: 2
 
-# Set the version of Python and other tools you might need
 build:
   os: ubuntu-22.04
-  tools:
-    python: "3.11"
 
 python:
-  version: "3.11"
+  version: 3.11
   install:
     - method: pip
       path: .
       extra_requirements:
         - docs
     - method: pip
-      requirements: sphinx_rtd_theme
+      extra_requirements:
+        - sphinx_rtd_theme