[#492][#493] Update RELEASE-NOTES for @Command(aliases) user manual improvement.

Closes #492.

Author: remkop

RELEASE-NOTES.md

@@ -22,6 +22,7 @@ Picocli follows [semantic versioning](http://semver.org/).
 - [#487] Enhancement: Auto-completion script should return from `generateOptionsSwitch` immediately if there is nothing to generate. Thanks to [David Walluck](https://github.com/dwalluck) for the pull request.
 - [#483][#486] Enhancement: Improve `Help.Ansi.AUTO`: automatically enable ANSI on Windows if Jansi's `AnsiConsole` has been installed. Thanks to [Philippe Charles](https://github.com/charphi) for the pull request.
 - [#491] Enhancement: Improve `Help.Ansi.AUTO` cygwin/msys detection on Windows.
+- [#492][#493] Doc: Add section on `@Command(aliases)` attribute to user manual. Thanks to [marinier](https://github.com/marinier) for the pull request.
 
 ## <a name="3.6.1-deprecated"></a> Deprecations
 No features were deprecated in this release.