relabel prometheus job name

relabel-prometheus-job-name.yml

scrape_configs:
  - job_name: 'example_job'
    scrape_interval: 5s
    static_configs:
      - targets: ['5s.example.com']

  # scrape more often, but keep same job name (example_job)
  - job_name: 'example_job_each_1s'
    scrape_interval: 1s
    static_configs:
      - targets: ['1s.example.com']
    relabel_configs:
      - source_labels: [job]
        target_label: "job"
        replacement: "example_job"