Update prow to v20251204-c1b4d92ca and ghproxy as needed#8744

k8s-infra-ci-robot wants to merge 1 commit intokubernetes:mainkubernetes/k8s.io:mainfrom

k8s-infra-ci-robot:autobumpk8s-infra-ci-robot/k8s.io:autobumpCopy head branch name to clipboard