docs: update changelog

Author: rbluethl

CHANGELOG.md

@@ -18,7 +18,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com), and this
 - **Self-upgrade resilience** — `zero upgrade --server` now pulls the `docker:cli` helper image automatically if missing, instead of failing with a 404
 - **Install script** — skip Let's Encrypt email prompt when the server domain is an IP address or `localhost`
 
-## [v2025.3.24] — Initial Release
+## [v2026.4.1] — Initial Release
 
 ### Added
 
@@ -40,5 +40,5 @@ The format is based on [Keep a Changelog](https://keepachangelog.com), and this
 - **CLI binaries** — prebuilt for Linux, macOS, and Windows
 
 [Unreleased]: https://github.com/shipzero/zero/compare/v2026.4.8...HEAD
-[v2026.4.8]: https://github.com/shipzero/zero/compare/v2025.3.24...v2026.4.8
-[v2025.3.24]: https://github.com/shipzero/zero/releases/tag/v2025.3.24
+[v2026.4.8]: https://github.com/shipzero/zero/compare/v2026.4.1...v2026.4.8
+[v2026.4.1]: https://github.com/shipzero/zero/releases/tag/v2026.4.1