docs: Update Readme

README.md

@@ -161,6 +161,7 @@ You will not be able to upgrade directly from `1.21` to `1.24`.
 | <a name="input_database_instance_class"></a> [database\_instance\_class](#input\_database\_instance\_class) | Instance type to use by database master instance. | `string` | `"db.r5.large"` | no |
 | <a name="input_database_master_username"></a> [database\_master\_username](#input\_database\_master\_username) | Specifies the master\_username value to set for the database | `string` | `"wandb"` | no |
 | <a name="input_database_name"></a> [database\_name](#input\_database\_name) | Specifies the name of the database | `string` | `"wandb_local"` | no |
+| <a name="input_database_performance_insights_kms_key_arn"></a> [database\_performance\_insights\_kms\_key\_arn](#input\_database\_performance\_insights\_kms\_key\_arn) | Specifies an existing KMS key ARN to encrypt the performance insights data if performance\_insights\_enabled is was enabled out of band | `string` | n/a | yes |
 | <a name="input_database_snapshot_identifier"></a> [database\_snapshot\_identifier](#input\_database\_snapshot\_identifier) | Specifies whether or not to create this cluster from a snapshot. You can use either the name or ARN when specifying a DB cluster snapshot, or the ARN when specifying a DB snapshot | `string` | `null` | no |
 | <a name="input_database_sort_buffer_size"></a> [database\_sort\_buffer\_size](#input\_database\_sort\_buffer\_size) | Specifies the sort\_buffer\_size value to set for the database | `number` | `67108864` | no |
 | <a name="input_deletion_protection"></a> [deletion\_protection](#input\_deletion\_protection) | If the instance should have deletion protection enabled. The database / S3 can't be deleted when this value is set to `true`. | `bool` | `true` | no |