Update CHANGELOG.md for #31852

CHANGELOG.md

@@ -1,5 +1,9 @@
 ## 5.2.0 (Unreleased)
 
+NOTES:
+
+* resource/aws_mwaa_environment: Upgrading your environment to a new major version of Apache Airflow forces replacement of the resource ([#31833](https://github.com/hashicorp/terraform-provider-aws/issues/31833))
+
 FEATURES:
 
 * **New Data Source:** `aws_budgets_budget` ([#31691](https://github.com/hashicorp/terraform-provider-aws/issues/31691))
@@ -16,14 +20,15 @@ ENHANCEMENTS:
 * data/aws_ec2_transit_gateway_connect_peer: Add `bgp_peer_address` and `bgp_transit_gateway_addresses` attributes ([#31752](https://github.com/hashicorp/terraform-provider-aws/issues/31752))
 * resource/aws_chime_voice_connector: Add tagging support ([#31746](https://github.com/hashicorp/terraform-provider-aws/issues/31746))
 * resource/aws_ec2_transit_gateway_connect_peer: Add `bgp_peer_address` and `bgp_transit_gateway_addresses` attributes ([#31752](https://github.com/hashicorp/terraform-provider-aws/issues/31752))
+* resource/aws_ec2_transit_gateway_route_table_association: Add `replace_existing_association` argument ([#31452](https://github.com/hashicorp/terraform-provider-aws/issues/31452))
 * resource/aws_fis_experiment_template: Add support for `Volumes` to `actions.*.target` ([#31499](https://github.com/hashicorp/terraform-provider-aws/issues/31499))
 * resource/aws_instance: Add `instance_market_options` configuration block and `instance_lifecycle` and `spot_instance_request_id` attributes ([#31495](https://github.com/hashicorp/terraform-provider-aws/issues/31495))
 * resource/aws_lambda_function: Add support for `ruby3.2` `runtime` value ([#31842](https://github.com/hashicorp/terraform-provider-aws/issues/31842))
 * resource/aws_lambda_layer_version: Add support for `ruby3.2` `compatible_runtimes` value ([#31842](https://github.com/hashicorp/terraform-provider-aws/issues/31842))
+* resource/aws_mwaa_environment: Consider `CREATING_SNAPSHOT` a valid pending state for resource update ([#31833](https://github.com/hashicorp/terraform-provider-aws/issues/31833))
 * resource/aws_networkfirewall_firewall_policy: Add `stream_exception_policy` option to `firewall_policy.stateful_engine_options` ([#31541](https://github.com/hashicorp/terraform-provider-aws/issues/31541))
 * resource/aws_redshiftserverless_workgroup: Additional supported values for `config_parameter.parameter_key` ([#31747](https://github.com/hashicorp/terraform-provider-aws/issues/31747))
 * resource/aws_sagemaker_model: Add `container.model_package_name` and `primary_container.model_package_name` arguments ([#31755](https://github.com/hashicorp/terraform-provider-aws/issues/31755))
-* resource/ec2_transit_gateway_route_table_association: Add `replace_existing_association` argument ([#31452](https://github.com/hashicorp/terraform-provider-aws/issues/31452))
 
 BUG FIXES: