fix: Update RTD config (#7647)

.readthedocs.yaml

@@ -2,6 +2,11 @@
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
 version: 2
 
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
 sphinx:
   configuration: docs/conf.py
   fail_on_warning: false
@@ -11,8 +16,5 @@ formats:
   - pdf
 
 python:
-  version: 3.8
-
   install:
     - requirements: docs/requirements.txt
-  system_packages: false