happa release v1.40.0

Changes

Display whether an app has been installed for the current selected cluster in the app catalog, and prevent re-installation by @kuosandys in https://github.com/giantswarm/happa/pull/3338
Auto-refresh information displayed in clusters’ installed apps list by @gusevda in https://github.com/giantswarm/happa/pull/3339
Align placeholders used in CLI commands in the Getting Started guide and clusters’ Ingress details by @marians in https://github.com/giantswarm/happa/pull/3331

Full Changelog: https://github.com/giantswarm/happa/compare/v1.39.4...v1.40.0