Incorrect sample payload for index templates documentation

[hexbioc]

I use v7.7.0 with AWS Elasticsearch Service.

The documentation for index templates suggests the following payload structure for creating an index template:

PUT _template/sample-index-template
{
  "index_patterns": ["sample-index-*"],
  "template": {
    "settings": {
      "index.default_pipeline": "sample_pipeline"
    }
  }
}

Above however does not seem to respect fields present inside the template key. Response for GET _template/sample-index-template:

{
  "sample-index-template" : {
    "order" : 0,
    "index_patterns" : [
      "sample-index-*"
    ],
    "settings" : { },
    "mappings" : { },
    "aliases" : { }
  }
}

In practice, the right payload seems to be as below:

PUT _template/sample-index-template
{
  "index_patterns": ["sample-index-*"],
  "settings": {
    "index.default_pipeline": "sample_pipeline"
  }
}

Notice the omission of the parent template key in the payload. This works as required, with the response for GET _template/sample-index-template as:

{
  "sample-index-template" : {
    "order" : 0,
    "index_patterns" : [
      "sample-index-*"
    ],
    "settings" : {
      "index" : {
        "default_pipeline" : "sample_pipeline"
      }
    },
    "mappings" : { },
    "aliases" : { }
  }
}

Should the documentation be updated? Or is this a bug in implementation?