Actor pushed from template does not have the `latest` tag on its build

[mnmkng]

I noticed when I wanted to start a pushed actor with a webhook and received the old error

{
  "error": {
    "type": "unknown-build-tag",
    "message": "Build with tag \"latest\" was not found. Has the actor been built already?"
  }
}

The build is there, but it has no tag.