muster v0.25.1

What's Changed

• ci: release reads /dl bucket and role from org variables by @schuettc in #188
• ci: version-guard v0.11.1 (reads current labels) by @schuettc in #189
• serve: one owner, restarted on upgrade (0.25.1) by @schuettc in #190
• muster 0.25.1 by @schuettc in #191

Full Changelog: v0.25.0...v0.25.1