Fixes missing closing parentheses in event stream docstring found in
#4251

Release v1.42.53 (2022-02-14)
===

### Service Client Updates
* `service/appflow`: Updates service API and documentation
* `service/athena`: Updates service API and documentation
  * This release adds a subfield, ErrorType, to the AthenaError response object in the GetQueryExecution API when a query fails.
* `service/rds`: Updates service API, documentation, waiters, paginators, and examples
  * Adds support for determining which Aurora PostgreSQL versions support Babelfish.

…mbers (#4269)

Updates the SDK's code generation to stop supporting new API modeled
JSONValue parameters. The SDK's JSONValue type is only compatible with
JSON documents with a top level JSON Object. JSON Lists, Strings,
Scalars, are not compatible. This prevents JSON Value working with some
APIs such as Amazon Lex Runtime Service's operations.

This update also introduces the breaking change to
service/lexruntimeservice package by changing the following parameters
from a JSONValue to string type.
* PostContentInput.ActiveContexts
* PutContentOutput.AlternativeIntents
* PutContentOutput.ActiveContexts
* PutSessionOutput.ActiveContexts

Release v1.43.0 (2022-02-16)
===

### Service Client Updates
* `service/budgets`: Updates service API and documentation
  * Adds support for auto-adjusting budgets, a new budget method alongside fixed and planned. Auto-adjusting budgets introduces new metadata to configure a budget limit baseline using a historical lookback average or current period forecast.
* `service/ce`: Updates service API
* `service/ec2`: Updates service API and documentation
  * Documentation updates for EC2.
* `service/glue`: Updates service API and documentation
  * Support for optimistic locking in UpdateTable
* `service/ssm`: Updates service documentation
  * Assorted ticket fixes and updates for AWS Systems Manager.

### SDK Features
* `codegen`: Updates the SDK's code generation to stop supporting new API modeled JSONValue parameters. The SDK's JSONValue type is only compatible with JSON documents with a top level JSON Object. JSON Lists, Strings, Scalars, are not compatible. This prevents JSON Value working with some APIs such as Amazon Lex Runtime Service's operations. 
  * Related to [#4264](#4264) and [#4258](#4258)

### SDK Bugs
* `service/lexruntimeservice`: Introduces a breaking change for following parameters from a JSONValue to string type, because the SDKs JSONValue is not compatible with JSON documents of lists.
  * PostContentInput.ActiveContexts
  * PutContentOutput.AlternativeIntents
  * PutContentOutput.ActiveContexts
  * PutSessionOutput.ActiveContexts
  * Fixes [#4258](#4258)

Release v1.43.1 (2022-02-17)
===

### Service Client Updates
* `service/backup`: Updates service API and documentation
* `service/evidently`: Updates service API and documentation
* `service/iam`: Updates service documentation
  * Documentation updates for AWS Identity and Access Management (IAM).
* `service/redshift`: Updates service API and documentation
  * SDK release for Cross region datasharing and cost-control for cross region datasharing