Add release notes for Kotlin inline value class support

Signed-off-by: Ogu1208 <kdasunb6@gmail.com>

Author: Ogu1208

documentation/modules/ROOT/partials/release-notes/release-notes-6.1.0-M2.adoc

@@ -51,6 +51,9 @@ repository on GitHub.
 * Introduce new `trimStacktrace(Class<?>)` and `retainStackTraceElements(int)`
   methods for `AssertionFailureBuilder`. These allow user defined assertions to
   trim their stacktrace.
+* Kotlin inline value classes (such as `Result<T>`) can now be used as parameters in
+`@ParameterizedTest` methods when `kotlin-reflect` is on the classpath.
+See {junit-team-issue}5081[#5081].
 
 [[v6.1.0-M2-junit-vintage]]
 === JUnit Vintage