Fix readthedocs config

.readthedocs.yml

@@ -1,4 +1,3 @@
----
 # .readthedocs.yml
 # Read the Docs configuration file
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
@@ -7,13 +6,17 @@
 version: 2
 
 # Build documentation in the docs/ directory with Sphinx
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.10"
+
 sphinx:
   configuration: docs/conf.py
 
 # Optionally build your docs in additional formats such as PDF and ePub
 formats: all
 
 python:
-  version: 3.7
   install:
     - requirements: docs/requirements.txt