apigateway: CfnBasePathMapping Python constructor id vs id_

### Describe the issue

Because `CfnBasePathMapping` has an actual keyword argument named `id` (itself a decision I hope won't be repeated due to the confusion it causes), the second positional parameter is named `id_`. This is correct in the method signature, but in the "Parameters" section, it incorrectly shows it as `id`, so there are two parameters with the same name.

### Links

https://docs.aws.amazon.com/cdk/api/v2/python/aws_cdk.aws_apigateway/CfnBasePathMapping.html

Start with the linked CfnBasePathMapping Python API documentation and compare its constructor signature with the Parameters section. Trace the documentation source or generation entry point responsible for that page; done means the second positional parameter is consistently shown as id_ rather than duplicated as id.

Written by the indexing model from the issue text.