feat: updated readme for conditional nameprefix

Author: Marc Portabella

README.md

@@ -201,6 +201,8 @@ No provider.
 | timeouts | (Optional) Updated Terraform resource management timeouts. Applies to `aws_db_instance` in particular to permit resource management times | `map(string)` | <pre>{<br>  "create": "40m",<br>  "delete": "40m",<br>  "update": "80m"<br>}</pre> | no |
 | timezone | (Optional) Time zone of the DB instance. timezone is currently only supported by Microsoft SQL Server. The timezone can only be set on creation. See MSSQL User Guide for more information. | `string` | `""` | no |
 | use\_parameter\_group\_name\_prefix | Whether to use the parameter group name prefix or not | `bool` | `true` | no |
+| use\_option\_group\_name\_prefix | Whether to use the option group name prefix or not | `bool` | `true` | no |
+| use\_subnet\_group\_name\_prefix | Whether to use the subnet group name prefix or not | `bool` | `true` | no |
 | username | Username for the master DB user | `string` | n/a | yes |
 | vpc\_security\_group\_ids | List of VPC security groups to associate | `list(string)` | `[]` | no |