Update .readthedocs.yml

[skip ci]

Author: bskinn

.readthedocs.yml

@@ -5,18 +5,22 @@
 # Required
 version: 2
 
-# Build with sphinx
-sphinx:
-  configuration: doc/source/conf.py
-
-# Build all the things
-formats: all
+# Build and VM configuration
+build:
+  os: 'ubuntu-22.04'
+  tools:
+    python: '3.10'
 
-# Python and requirements
+# Python requirements
 python:
-  version: '3.8'
   install:
     - requirements: requirements-rtd.txt
     - method: pip
       path: .
 
+# Build with sphinx
+sphinx:
+  configuration: doc/source/conf.py
+
+# Build all the things
+formats: all