Releases are not properly created (missing `assets`)

[Phred Lane]

This makes the helper more complicated to install programmatically.

Consider a release of the GitHub CLI. There are 20+ assets listed compared to a release of this helper.

This can also be viewed view the CLI:

➜  meh gh api /repos/cli/cli/releases/latest | jq '.assets | length'
18
➜  meh gh api /repos/awslabs/amazon-ecr-credential-helper/releases/latest | jq '.assets | length'
0