Update release notes wrt #923

Author: k163377

release-notes/CREDITS-2.x

@@ -18,6 +18,7 @@ Contributors:
 # 2.18.4 (not yet released)
 
 WrongWrong (@k163377)
+* #923: Fixed hasRequiredMarker to only process content defined in Kotlin
 * #920: Minor refactors that do not affect behavior
 
 # 2.18.3 (28-Feb-2025)

release-notes/VERSION-2.x

@@ -18,6 +18,8 @@ Co-maintainers:
 
 2.18.4 (not yet released)
 
+#923: Fixed a problem where the result of processing `hasRequiredMarker ` by a `KotlinModule` would also apply to
+  classes defined in `Java` when `NullToEmptyCollection` or `NullToEmptyMap` was enabled.
 #920: Minor refactorings were made that did not affect behavior.
 
 2.18.3 (28-Feb-2025)