Update bundled Python interpreter to 3.13.9 (aws#9819)

Author: hssyoo

.changes/next-release/enhancement-Python-69299.json

@@ -0,0 +1,5 @@
+{
+  "type": "enhancement",
+  "category": "Python",
+  "description": "Upgrade bundled Python interpreter to 3.13.9"
+}