http_sd_configs: authorization.type is not defaulted to "Bearer" as doc claims

In https://prometheus.io/docs/prometheus/latest/configuration/configuration/#http_sd_config

Docs says:

# Optional `Authorization` header configuration.
authorization:
  # Sets the authentication type.
  [ type: [<string>] | default: Bearer ]

But it did not work, this config below does not send Bearer

scrape_configs:
  - job_name: xyz
    http_sd_configs:
      - url: "http://127.0.1:8000"
        authorization:
          credentials: <token>

While enabled debug on my endpoint showed, it only sends

Authorization: <token>

not the expected

Authorization: Bearer <token>

After setting the type explicitly, the config worked as expected:

scrape_configs:
  - job_name: xyz
    http_sd_configs:
      - url: "http://127.0.1:8000"
        authorization:
          credentials: <token>
          type: Bearer

Start with the linked Prometheus configuration documentation and its http_sd_config authorization section, then compare the documented default with the supplied YAML examples and observed header behavior. Done means the documentation accurately matches the supported behavior and clearly explains whether type must be set explicitly.