chore: update README.md

Author: actions-user

README.md

@@ -151,6 +151,7 @@ module "efs" {
 | <a name="input_name"></a> [name](#input\_name) | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.<br/>This is the only ID element not also included as a `tag`.<br/>The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input. | `string` | `null` | no |
 | <a name="input_namespace"></a> [namespace](#input\_namespace) | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | `string` | `null` | no |
 | <a name="input_performance_mode"></a> [performance\_mode](#input\_performance\_mode) | The file system performance mode. Can be either `generalPurpose` or `maxIO` | `string` | `"generalPurpose"` | no |
+| <a name="input_preserve_security_group_id"></a> [preserve\_security\_group\_id](#input\_preserve\_security\_group\_id) | If `true`, instruct the underlying security group module to attempt to preserve<br/>the security group ID across rule changes. See the upstream CloudPosse<br/>`terraform-aws-security-group` module README for details and caveats. | `bool` | `false` | no |
 | <a name="input_provisioned_throughput_in_mibps"></a> [provisioned\_throughput\_in\_mibps](#input\_provisioned\_throughput\_in\_mibps) | The throughput, measured in MiB/s, that you want to provision for the file system. Only applicable with `throughput_mode` set to provisioned | `number` | `0` | no |
 | <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br/>Characters matching the regex will be removed from the ID elements.<br/>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
 | <a name="input_region"></a> [region](#input\_region) | AWS Region | `string` | n/a | yes |