Readme example to point to the latest version on Git (#34)

the latest version (v1.2.0) isn't compatible with the example in the readme, updated the example to target the latest commit of the default branch of the repo

README.md

@@ -14,7 +14,7 @@ an ASG
 
 ```hcl
 module "fck-nat" {
-  source = "RaJiska/fck-nat/aws"
+  source = "git::https://github.com/RaJiska/terraform-aws-fck-nat.git" # Use the latest changes in the main branch 
 
   name                 = "my-fck-nat"
   vpc_id               = "vpc-abc1234"
@@ -116,4 +116,4 @@ module "fck-nat" {
 | <a name="output_security_group_id"></a> [security\_group\_id](#output\_security\_group\_id) | Deprecated. The ID of the security group used by fck-nat ENIs |
 | <a name="output_security_group_ids"></a> [security\_group\_ids](#output\_security\_group\_ids) | List of security group IDs used by fck-nat ENIs |
 | <a name="output_subnet_id"></a> [subnet\_id](#output\_subnet\_id) | Subnet ID to which the fck-nat instance is deployed into |
-| <a name="output_vpc_id"></a> [vpc\_id](#output\_vpc\_id) | VPC ID to which the fck-nat instance is deployed into |
+| <a name="output_vpc_id"></a> [vpc\_id](#output\_vpc\_id) | VPC ID to which the fck-nat instance is deployed into |