[#1142] Update RELEASE-NOTES.md for updated Kotlin GraalVM native image example

Author: remkop

RELEASE-NOTES.md

@@ -24,6 +24,7 @@ Picocli follows [semantic versioning](http://semver.org/).
 
 
 ## <a name="4.5.1-fixes"></a> Fixed issues
+* [#1142] DOC: Update Kotlin GraalVM native image example - Update native image gradle plugin. Now supports jdk 11. Thanks to [OndrejMalek](https://github.com/OndrejMalek) for the pull request.
 * [#1153] DOC: Fix documentation leading code quote. Thanks to sabrina at exchange.culturesky.com for reporting this.
 
 ## <a name="4.5.1-deprecated"></a> Deprecations