Bump jupyterhub from 5.3.0 to 5.4.0 in /images/hub/unfrozen#3750

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dependabot/pip/images/hub/unfrozen/jupyterhub-5.4.0jupyterhub/zero-to-jupyterhub-k8s:dependabot/pip/images/hub/unfrozen/jupyterhub-5.4.0Copy head branch name to clipboard