0.22.2

What's Changed

• Clarify Harbor registry support and mutable-tag updates by @rusenask in #897
• Add nightly pre-release workflow with unit tests by @rusenask in #898
• mattermost fix by @rusenask in #899
• feat(notifications): report image digests in update notifications by @rusenask in #900
• fix(poll): force policy must not downgrade to older tags (fixes #823) by @rusenask in #901
• fix(notifications): accept all 2xx statuses in discord webhook sender (fixes #827) by @rusenask in #903
• fix(security): keep webhook signing secrets and credentials out of log output by @rusenask in #904
• fix(kubernetes): retry conflict on workload updates (fixes #818) by @rusenask in #902
• ci: publish multi-arch Keel images to Docker Hub by @rusenask in #906
• test(bot/hipchat): make TestBotAproval deterministic by @rusenask in #907
• fix(providers): queue update events through bounded per-provider buffers (fixes #443) by @rusenask in #905
• Make node metadata access failures actionable by @rusenask in #910
• Publish application releases only to GHCR by @rusenask in #911

Full Changelog: 0.22.1...0.22.2