chore(aws-kinesisanalytics-flink): latest version available (#23206)

[
Amazon Kinesis Data Analytics for Apache Flink now supports Apache Flink version 1.15
](https://aws.amazon.com/about-aws/whats-new/2022/11/amazon-kinesis-data-analytics-apache-flink-supports-flink-version-1-15/)
### All Submissions:

* [X] Have you followed the guidelines in our [Contributing guide?](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md)

### Adding new Construct Runtime Dependencies:

* [ ] This PR adds new construct runtime dependencies following the process described [here](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md/#adding-construct-runtime-dependencies)

### New Features

* [ ] Have you added the new feature to an [integration test](https://github.com/aws/aws-cdk/blob/main/INTEGRATION_TESTS.md)?
	* [ ] Did you use `yarn integ` to deploy the infrastructure and generate the snapshot (i.e. `yarn integ` without `--dry-run`)?

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/@aws-cdk/aws-kinesisanalytics-flink/lib/types.ts

@@ -56,6 +56,9 @@ export class Runtime {
   /** Flink Version 1.13 */
   public static readonly FLINK_1_13 = Runtime.of('FLINK-1_13');
 
+  /** Flink Version 1.15 */
+  public static readonly FLINK_1_15 = Runtime.of('FLINK-1_15');
+
   /** Create a new Runtime with with an arbitrary Flink version string */
   public static of(value: string) {
     return new Runtime(value);