build: update ReadTheDocs Python to 3.13

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: satcfdi

.readthedocs.yaml

@@ -9,7 +9,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.11"
+    python: "3.13"
     # You can also specify other tool versions:
     # nodejs: "16"
     # rust: "1.55"