klausctl release v0.5.4

Fixed

• (deps) Update module github.com/giantswarm/go-selfupdate to v1.6.2 in #384 by @renovate[bot]
• (deps) Update module github.com/giantswarm/go-selfupdate to v1.6.3 in #385 by @renovate[bot]

Full Changelog: https://github.com/giantswarm/klausctl/compare/v0.5.3...v0.5.4