Bump cloud.google.com/go/monitoring from 1.20.2 to 1.20.3 in /prometheus-to-sd#757

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dependabot/go_modules/prometheus-to-sd/cloud.google.com/go/monitoring-1.20.3GoogleCloudPlatform/k8s-stackdriver:dependabot/go_modules/prometheus-to-sd/cloud.google.com/go/monitoring-1.20.3Copy head branch name to clipboard