retag images in ghcr without pulling them
this action uses the following inputs (all are required):
| Variable | Description | Example |
|---|---|---|
| old_tag | the old tag that you want to assign a new tag to (old tag will NOT be deleted) | latest |
| new_tag | the new tag you want to assign to the tag above | production |
| ghcr_username | credentials to access ghcr | myuser |
| ghcr_password | credentials to access ghcr | supersecretpassword |
| ghcr_repo | the docker image you want to assign the new tag to | myuser/mycontainer |