[AWS::BedrockAgentCore::GatewayTarget] - [Docs] - ApiSchemaConfiguration S3 with wrong description

### Name of the resource

Other

### Resource name

AWS::BedrockAgentCore::GatewayTarget

### Reference Link

https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/aws-properties-bedrockagentcore-gatewaytarget-apischemaconfiguration.html

### Details

currently states

> S3

The API schema configuration.

This does not describe the S3 property. We are on the ApiSchemaConfiguration page. Everything here is "The API schema configuration.".

The property needs a better description.

Start with the linked AWS CloudFormation reference page and inspect the S3 property under ApiSchemaConfiguration. Replace the generic description with wording that accurately describes the S3 property, then verify the rendered documentation shows the corrected text.

Written by the indexing model from the issue text.