Update ReadTheDocs configuration to v2 format

- Add build.os and build.tools sections (required by RTD)
- Update Python version from 3.7 to 3.12
- Use ubuntu-22.04 build image
- Fixes 'Value build not found' validation error

Author: mmcky

.readthedocs.yml

@@ -5,12 +5,18 @@
 # Required
 version: 2
 
+# Set the OS, Python version and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.12"
+
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
   configuration: docs/source/conf.py
 
+# Install Python dependencies
 python:
-  version: 3.7
   install:
     - method: pip
       path: .