rtd config fix

Author: MuellerSeb

.readthedocs.yml

@@ -1,12 +1,16 @@
 version: 2
 
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
 sphinx:
   configuration: docs/source/conf.py
 
 formats: all
 
 python:
-  version: 3.8
   install:
     - method: pip
       path: .