Update Python to 3.12.12 (#318)

Author: cdce8p

python/3.12/build.yaml

@@ -9,7 +9,7 @@ cosign:
   base_identity: https://github.com/home-assistant/docker-base/.*
   identity: https://github.com/home-assistant/docker-base/.*
 args:
-  PYTHON_VERSION: "3.12.11"
+  PYTHON_VERSION: "3.12.12"
   PIP_VERSION: "25.2"
   CERT_IDENTITY: [email protected]
   CERT_OIDC_ISSUER: https://accounts.google.com