Update README.md

Undo bad change

Author: vanastassiou

README.md

@@ -109,7 +109,7 @@ Setup the account-level settings for logging and metrics for API Gateway:
 
 ```hcl
 module "api_gateway_account_settings" {
-  source  = "cloudposse/api-gateway/aws/modules/account-settings"
+  source  = "cloudposse/api-gateway/aws//modules/account-settings"
   # version = "x.x.x"
 
   context = module.this.context