build(deps): bump github.com/prometheus/client_golang from 1.17.0 to 1.21.1#420

dependabot[bot] wants to merge 1 commit intomasterGoogleCloudPlatform/netd:masterfrom

dependabot/go_modules/github.com/prometheus/client_golang-1.21.1GoogleCloudPlatform/netd:dependabot/go_modules/github.com/prometheus/client_golang-1.21.1Copy head branch name to clipboard