deps: bump github.com/prometheus/client_golang from 1.20.5 to 1.21.0#3434

dependabot[bot] wants to merge 1 commit intorelease/v1.5Azure/azure-container-networking:release/v1.5from

e6f7dependabot/go_modules/release/v1.5/github.com/prometheus/client_golang-1.21.0Azure/azure-container-networking:e6f7dependabot/go_modules/release/v1.5/github.com/prometheus/client_golang-1.21.0Copy head branch name to clipboard