Fix connector terminology

Author: lcawl

specification/connector/post/ConnectorPostRequest.ts

@@ -23,8 +23,8 @@ import { IndexName } from '@_types/common'
  * Create a connector.
  *
  * Connectors are Elasticsearch integrations that bring content from third-party data sources, which can be deployed on Elastic Cloud or hosted on your own infrastructure.
- * Native connectors are a managed service on Elastic Cloud.
- * Connector clients are self-managed on your infrastructure.
+ * Elastic managed connectors (Native connectors) are a managed service on Elastic Cloud.
+ * Self-managed connectors (Connector clients) are self-managed on your infrastructure.
  * @rest_spec_name connector.post
  * @availability stack since=8.12.0 stability=beta
  * @availability serverless stability=beta visibility=public

specification/connector/update_api_key_id/ConnectorUpdateAPIKeyIDRequest.ts

@@ -23,8 +23,8 @@ import { Id } from '@_types/common'
  *
  * Update the `api_key_id` and `api_key_secret_id` fields of a connector.
  * You can specify the ID of the API key used for authorization and the ID of the connector secret where the API key is stored.
- * The connector secret ID is required only for native connectors.
- * Connector clients do not use this field.
+ * The connector secret ID is required only for Elastic managed (native) connectors.
+ * Self-managed connectors (connector clients) do not use this field.
  * @rest_spec_name connector.update_api_key_id
  * @availability stack since=8.12.0 stability=beta
  * @availability serverless stability=beta visibility=public