`mu pipeline logs` gives `ResourceNotFoundException: The specified log group does not exist.` error

[timbaileyjones]

While testing another PR, I found that mu pipeline logs command displays information from the pipelines, but also shows this error:

$ mu pipeline logs
[... normal, expected output ...]
func1 ▶ ERROR  ResourceNotFoundException: The specified log group does not exist.
	status code: 400, request id: f7260741-7f69-4772-b4cc-7c6a9c22d264

This error does not occur with the -f (follow) option.

Note that everything in the pipeline & deployments is still actually working. It would be nice to eliminate this spurious message.