RtD: use latest Ubuntu (#1954)

.github/labeler.yml

@@ -33,6 +33,7 @@ documentation:
     - "docs/**"
     - "*.md"
     - ".github/*.md"
+    - ".readthedocs.yaml"
 scripts:
 - changed-files:
   - any-glob-to-any-file:

.readthedocs.yaml

@@ -6,7 +6,7 @@ version: 2
 
 # Set the version of Python
 build:
-  os: ubuntu-22.04
+  os: ubuntu-lts-latest
   tools:
     python: "3.12"