(🎁) use 3.13 on cloud functions

[KotlinIsland]

As Cloud Functions doesn't support Python 3.13 runtime yet, we should keep using Python 3.12 for now: https://cloud.google.com/functions/docs/runtime-support#python

• python3.13 #780 (comment)

https://console.cloud.google.com/artifacts/docker/serverless-runtimes/us-central1/google-22-full

[ItsHarper]

Cloud Functions supports Python 3.13 now: https://cloud.google.com/functions/docs/runtime-support#python