Update RTD config to new rules

Author: javh

.readthedocs.yml

@@ -1,5 +1,9 @@
 # Required
 version: 2
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
@@ -12,6 +16,5 @@ formats:
 
 # Optionally set the version of Python and requirements required to build your docs
 python:
-  version: 3.7
   install:
     - requirements: docs/requirements.txt