add error when empty metric values to changelog

Signed-off-by: Rob Pickerill <[email protected]>

CHANGELOG.md

@@ -67,6 +67,7 @@ Here is an overview of all new **experimental** features:
 - **General**: Add GRPC Healthchecks ([#5590](https://github.com/kedacore/keda/issues/5590))
 - **General**: Add OPENTELEMETRY flag in e2e test YAML ([#5375](https://github.com/kedacore/keda/issues/5375))
 - **General**: Add support for cross tenant/cloud authentication when using Azure Workload Identity for TriggerAuthentication ([#5441](https://github.com/kedacore/keda/issues/5441))
+- **AWS CloudWatch Scaler**: Add support for errorWhenMetricValuesEmpty ([#5352](https://github.com/kedacore/keda/issues/5352))
 - **Metrics API Scaler**: Add support for various formats: json, xml, yaml, prometheus ([#2633](https://github.com/kedacore/keda/issues/2633))
 - **MongoDB Scaler**: Add scheme field support srv record ([#5544](https://github.com/kedacore/keda/issues/5544))