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

[resmo]

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