Stop passing skopeo transport URLs to cosign

[chainchad]

Fixes:

Run "${ACTION_PATH}/scripts/promote-images.sh"
  -> Copying docker://<aws-account-id-src>.dkr.ecr.us-west-2.amazonaws.com/containers/<image-name>:pr-3-173d27a to docker://<aws-account-id-dst>.dkr.ecr.us-west-2.amazonaws.com/containers/<image-name>:pr-3-173d27a
  Error: Get "https://docker/v2/": dial tcp: lookup docker on 127.0.0.53:53: server misbehaving
  error during command execution: Get "https://docker/v2/": dial tcp: lookup docker on 127.0.0.53:53: server misbehaving
  ✗ Failed to copy docker://<aws-account-id-dst>.dkr.ecr.us-west-2.amazonaws.com/containers/c<image-name>:pr-3-173d27a to docker://<aws-account-id-src>.dkr.ecr.us-west-2.amazonaws.com/containers/<image-name>:pr-3-173d27a

[github-actions]

🦋 Changeset is good to go

Latest commit: aa959c3

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