Update changelog

CHANGELOG.md

 
+<a name="v1.8.1"></a>
+## [v1.8.1] - 2022-10-15
+
 <a name="v1.8.0"></a>
 ## [v1.8.0] - 2022-10-15
 ### Bug Fixes
@@ -87,6 +90,7 @@
 <a name="v1.0.0"></a>
 ## v1.0.0 - 2022-10-04
 
+[v1.8.1]: https://gitlab.schukai.com/oss/libraries/go/application/xflags/compare/v1.8.0...v1.8.1
 [v1.8.0]: https://gitlab.schukai.com/oss/libraries/go/application/xflags/compare/v1.7.0...v1.8.0
 [v1.7.0]: https://gitlab.schukai.com/oss/libraries/go/application/xflags/compare/v1.6.0...v1.7.0
 [v1.6.0]: https://gitlab.schukai.com/oss/libraries/go/application/xflags/compare/v1.5.0...v1.6.0