Update readthedocs config to use python 3.11

See: readthedocs/readthedocs.org#10290

Signed-off-by: Tesshu Flower <tflower@redhat.com>

.readthedocs.yml

@@ -3,6 +3,11 @@
 # Read the Docs configuration file
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
 version: 2
+# Set the version of Python and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
   builder: html
@@ -13,6 +18,5 @@ formats:
 # Optionally set the version of Python and requirements required to build your
 # docs
 python:
-  # version: 3.7
   install:
     - requirements: docs/requirements.txt