Update CHANGELOG.md for #21305

CHANGELOG.md

@@ -14,6 +14,7 @@ ENHANCEMENTS:
 * resource/aws_glue_resource_policy: Add `enable_hybrid` argument. ([#21239](https://github.com/hashicorp/terraform-provider-aws/issues/21239))
 * resource/aws_instance: Add `placement_partition_number` argument ([#7777](https://github.com/hashicorp/terraform-provider-aws/issues/7777))
 * resource/aws_placement_group: Add `partition_count` argument ([#15360](https://github.com/hashicorp/terraform-provider-aws/issues/15360))
+* resource/aws_rds_cluster: Add `db_instance_parameter_group_name` attribute to allow major version upgrade using custom parameter groups ([#17111](https://github.com/hashicorp/terraform-provider-aws/issues/17111))
 * resource/aws_rds_cluster: Add `enable_global_write_forwarding` attribute ([#17111](https://github.com/hashicorp/terraform-provider-aws/issues/17111))
 * resource/glue_connection: Add tagging support. ([#21226](https://github.com/hashicorp/terraform-provider-aws/issues/21226))
 * resource/rds_cluster_instance: Add `performance_insights_retention_period` attribute ([#17111](https://github.com/hashicorp/terraform-provider-aws/issues/17111))
@@ -22,6 +23,8 @@ BUG FIXES:
 
 * resource/aws_glue_catalog_table: change `partition_index.keys` to list instead of set ([#21234](https://github.com/hashicorp/terraform-provider-aws/issues/21234))
 * resource/aws_imagebuilder_distribution_configuration: remove hard limit on distribution target accounts ([#21254](https://github.com/hashicorp/terraform-provider-aws/issues/21254))
+* resource/aws_rds_cluster: Add possible pending states for cluster update ([#17111](https://github.com/hashicorp/terraform-provider-aws/issues/17111))
+* resource/aws_rds_cluster_instance: Remove force new resource on the `engine_version` parameter to allow upgrade without remove instances ([#17111](https://github.com/hashicorp/terraform-provider-aws/issues/17111))
 * resource/glue_catalog_table: Ignore not exists errors on delete ([#21227](https://github.com/hashicorp/terraform-provider-aws/issues/21227))
 
 ## 3.62.0 (October 08, 2021)