Update readthedocs configuration to use Python 3.10

The Readthedocs configuration file has been updated to utilize Python 3.10 instead of Python 3.6. No changes were made to other sections of the config file.

.readthedocs.yml

@@ -7,12 +7,12 @@ mkdocs:
 build:
   os: ubuntu-20.04
   tools:
-    python: "3.6"
+    python: "3.10"
 
 python:
   install:
     - requirements: docs/requirements.txt
     - method: pip
       path: .
       extra_requirements:
-        - docs
+        - docs