build on readthedocs with python 3.13

Author: mcflugen

.readthedocs.yaml

@@ -3,7 +3,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.11"
+    python: "3.13"
   jobs:
     pre_build:
       - sphinx-apidoc -e -force --no-toc --module-first -o docs/source/api babelizer