chore(rds): add Aurora Postgres 16.2 cluster support

[Chemsmith]

Issue # (if applicable)

N/A

Reason for this change

Cluster can be upgraded/created to Postgres 16.2 via the console/CLI but not CDK.

Description of changes

Adds support for Postgres 16.2 Aurora cluster, 16.2 instances are already supported.

Description of how you validated changes

N/A

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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

[paulhcsun]

Awesome, thanks for the contribution!

[paulhcsun]

@Mergifyio update

[mergify]

update

✅ Branch has been successfully updated

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 8a47e26
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[aws-cdk-automation]

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