Fix comet_ec2_alb var public_subnets type and update readme

Author: burmek

comet-infrastructure/modules/comet_ec2_alb/README.md

@@ -30,7 +30,7 @@
 | Name | Description | Type | Default | Required |
 |------|-------------|------|---------|:--------:|
 | <a name="input_environment"></a> [environment](#input\_environment) | Deployment environment, i.e. dev/stage/prod, etc | `string` | n/a | yes |
-| <a name="input_public_subnets"></a> [public\_subnets](#input\_public\_subnets) | Subnets specified for ALB | `list(any)` | n/a | yes |
+| <a name="input_public_subnets"></a> [public\_subnets](#input\_public\_subnets) | Subnets specified for ALB | `list(string)` | n/a | yes |
 | <a name="input_ssl_certificate_arn"></a> [ssl\_certificate\_arn](#input\_ssl\_certificate\_arn) | ARN of the ACM certificate to use for the ALB | `string` | n/a | yes |
 | <a name="input_vpc_id"></a> [vpc\_id](#input\_vpc\_id) | ID of the VPC that will contain the provisioned resources | `string` | n/a | yes |
 

comet-infrastructure/modules/comet_ec2_alb/variables.tf

@@ -10,7 +10,7 @@ variable "vpc_id" {
 
 variable "public_subnets" {
   description = "Subnets specified for ALB"
-  type        = list(any)
+  type        = list(string)
 }
 
 variable "ssl_certificate_arn" {