Update vpc-endpoint.tf

[hultzj]

Fixed the aws update that introduced a bug within the TF script

Hashicorp Link to issue introduced by AWS on 2/2/2021

https://discuss.hashicorp.com/t/notice-aws-vpc-endpoint-service-error-multiple-vpc-endpoint-services-matched/20472

[hultzj]

Verified its broken on Govcloud as well.

fatal: [localhost]: FAILED! => {"changed": false, "msg": "Terraform plan could not be created\r\nSTDOUT: \nWarning: Interpolation-only expressions are deprecated\n\n  on registry-node/registry-node.tf line 54, in resource \"aws_route53_record\" \"registry-entry\":\n  54:   records = [\"${aws_instance.registry-node.private_ip}\"]\n\nTerraform 0.11 and earlier required all non-constant expressions to be\nprovided via interpolation syntax, but this pattern is now deprecated. To\nsilence this warning, remove the \"${ sequence from the start and the }\"\nsequence from the end of this expression, leaving just the inner expression.\n\nTemplate interpolation syntax is still used to construct strings from\nexpressions when the template includes multiple interpolation sequences or a\nmixture of literal strings and interpolations. This deprecation applies only\nto templates that consist entirely of a single interpolation sequence.\n\n(and one more similar warning elsewhere)\n\n\r\n\r\nSTDERR: \nError: multiple VPC Endpoint Services matched; use additional constraints to reduce matches to a single VPC Endpoint Service\n\n\n"}