fix(samples): Updated and fixed the secrets sample (#4590)
fix(samples): Updated and fixed the secrets sample (#4590)

The sample started failing with "ImportError: cannot import name 'collections_abc' from 'six.moves' (unknown location)".
Updating the sample and fixing the issue.
kubeflow/pipelines,kubeflow/pipelines,kubeflow/pipelines,kubeflow/pipelines,kubeflow/pipelines,kubeflow/pipelines