Merge pull request #8785 from mhilbrunner/add-rtd-config

[3.3] Update RTD config

.readthedocs.yml

@@ -5,7 +5,9 @@
 version: 2
 
 build:
-  image: latest
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
 
 sphinx:
   configuration: conf.py