chore: add extended request ID to span.aws.client

docs/cloud-providers/aws-sdk.md

@@ -34,6 +34,7 @@ with the naming guidelines for RPC client spans.
 | Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
 |---|---|---|---|---|---|
 | [`rpc.system`](/docs/attributes-registry/rpc.md) | string | The value `aws-api`. | `aws-api` | `Required` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
+| [`aws.extended_request_id`](/docs/attributes-registry/aws.md) | string | The AWS extended request ID as returned in the response header `x-amz-id-2`. | `wzHcyEWfmOGDIE5QOhTAqFDoDWP3y8IUvpNINCwL9N4TEHbUw0/gZJ+VZTmCNCWR7fezEN3eCiQ=` | `Conditionally Required` If available. | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | [`aws.request_id`](/docs/attributes-registry/aws.md) | string | The AWS request ID as returned in the response headers `x-amz-request-id` or `x-amz-requestid`. | `79b9da39-b7ae-508a-a6bc-864b2829c622`; `C9ER4AJX75574TDJ` | `Recommended` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | [`rpc.method`](/docs/attributes-registry/rpc.md) | string | The name of the operation corresponding to the request, as returned by the AWS SDK [1] | `GetItem`; `PutItem` | `Recommended` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | [`rpc.service`](/docs/attributes-registry/rpc.md) | string | The name of the service to which a request is made, as returned by the AWS SDK. [2] | `DynamoDB`; `S3` | `Recommended` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |