build(deps): bump github.com/prometheus/client_golang from 1.14.0 to 1.15.1#124

dependabot[bot] wants to merge 1 commit intomainlivepeer/livepeer-data:mainfrom

dependabot/go_modules/github.com/prometheus/client_golang-1.15.1livepeer/livepeer-data:dependabot/go_modules/github.com/prometheus/client_golang-1.15.1Copy head branch name to clipboard