sfn-glue-sync-cdk: Update aws-cdk-lib and replace deprecated Python shell 3.6 with 3.9

[kakakakakku]

Issue #, if available:
N/A

Description of changes:
Hi😀 Thanks for the useful patterns!

To keep this pattern maintainable, I updated the aws-cdk-lib.

Check

cdk deploy completed successfully and works good.

$ aws stepfunctions start-execution --state-machine-arn "arn:aws:states:ap-northeast-1:000000000000:stateMachine:GlueJobStateMachineE759615B-at44lw4ZXLFV" --input "{\"message\": \"Hello from sfn glue step\"}"
{
    "executionArn": "arn:aws:states:ap-northeast-1:000000000000:execution:GlueJobStateMachineE759615B-at44lw4ZXLFV:132bb420-2b55-4fa4-9085-63a0e226e2d7",
    "startDate": "2026-07-06T23:55:20.379000+09:00"
}

Thank you😀

---

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[kakakakakku]

[WARNING] aws-cdk-lib.aws_stepfunctions.TaskStateBaseOptions#timeout is deprecated.
  use `taskTimeout`
  This API will be removed in the next major release.
[WARNING] aws-cdk-lib.aws_stepfunctions.StateMachineProps#definition is deprecated.
  use definitionBody: DefinitionBody.fromChainable()
  This API will be removed in the next major release.

[kakakakakku]

note: python_version='3' means Python 3.6, which is already deprecated. I updated it to '3.9', the latest version available for Python shell jobs. No newer Python version has been released for Python shell jobs since then.

See https://docs.aws.amazon.com/glue/latest/dg/add-job-python.html

The same change was made and approved in PR below.

• sfn-glue-sam: Replace deprecated Python shell 3.6 with 3.9 #3130