v1.8.1: update sample reports, fix test fixture genotype format

Author: dial481

CHANGELOG.md

@@ -2,6 +2,12 @@
 
 All notable changes are documented here. Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/); the project follows [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.8.1]
+
+### Changed
+- **Updated sample reports.** Regenerated `examples/sample_reports/` with
+  v1.8.0 report format (5-column table, detail sidebar, dark mode).
+
 ## [1.8.0]
 
 ### Changed
@@ -1616,6 +1622,7 @@ All notable changes are documented here. Format follows [Keep a Changelog](https
 - GitHub Actions CI matrix on Python 3.11 and 3.12.
 
 
+[1.8.1]: https://github.com/dial481/allelix/compare/v1.8.0...v1.8.1
 [1.8.0]: https://github.com/dial481/allelix/compare/v1.7.0...v1.8.0
 [1.7.0]: https://github.com/dial481/allelix/compare/v1.6.1...v1.7.0
 [1.6.1]: https://github.com/dial481/allelix/compare/v1.6.0...v1.6.1