docs(route53): changeresourcerecordsets action name fix (aws#29772)

### Reason for this change

Docs currently list an example for an invalid route53 action name

### Description of changes

Fix action name in docs

### Description of how you validated changes

N/A

### Checklist
- [X] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

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

packages/aws-cdk-lib/aws-route53/README.md

@@ -259,9 +259,9 @@ const crossAccountRole = new iam.Role(this, 'CrossAccountRole', {
           resources: ['*'],
         }),
         new iam.PolicyStatement({
-          sid: 'GetHostedZoneAndChangeResourceRecordSet',
+          sid: 'GetHostedZoneAndChangeResourceRecordSets',
           effect: iam.Effect.ALLOW,
-          actions: ['route53:GetHostedZone', 'route53:ChangeResourceRecordSet'],
+          actions: ['route53:GetHostedZone', 'route53:ChangeResourceRecordSets'],
           // This example assumes the RecordSet subdomain.somexample.com
           // is contained in the HostedZone
           resources: ['arn:aws:route53:::hostedzone/HZID00000000000000000'],