update Usage Example in Readme.

[AyushJakhmola]

I used this module to create key-pair and found that the example in read me is not working properly.

module "key_pair" {
  source = "squareops/keypair/aws"

  environment   = production
  key_name      = example-key
  ssm_parameter = production-example-key
}

got Error: unsupported argument and Error: Invalid reference.

Please update the key ssm_parameter to ssm_parameter_path and add "" (double quoted) in values as follows:

module "key_pair" {
  source = "squareops/keypair/aws"

  environment   = "production"
  key_name      = "example-key"
  ssm_parameter_path = "production-example-key"
}

I have tested the above module and it is working fine now.

[nitin-yadav-sq]

The issue has been fixed in https://github.com/squareops/terraform-aws-keypair/releases/tag/v1.0.2