Add pre-commit hook tags

Author: akae

README.md

@@ -38,6 +38,8 @@ module "redis" {
   }]
 }
 ```
+
+<!-- BEGINNING OF PRE-COMMIT-TERRAFORM DOCS HOOK -->
 ## Requirements
 
 | Name | Version |
@@ -116,6 +118,8 @@ No modules.
 | <a name="output_redis_security_group_id"></a> [redis\_security\_group\_id](#output\_redis\_security\_group\_id) | n/a |
 | <a name="output_redis_subnet_group_name"></a> [redis\_subnet\_group\_name](#output\_redis\_subnet\_group\_name) | n/a |
 
+<!-- END OF PRE-COMMIT-TERRAFORM DOCS HOOK -->
+
 ## Authors
 
 Created by [Tim Hartmann](https://github.com/tfhartmann). Maintained by [Anton Babenko](https://github.com/antonbabenko) and [these awesome contributors](https://github.com/terraform-community-modules/tf_aws_elasticache_redis/graphs/contributors).