Update release notes wrt #4078

Author: cowtowncoder

release-notes/CREDITS-2.x

@@ -1680,3 +1680,7 @@ iProdigy (iProdigy@github)
 Jason Laber (jlaber@github)
  * Reported #3948: `@JsonIgnore` no longer works for transient backing fields
   (2.16.0)
+
+Andreas Zahnen (azahnen@github)
+ * Reported #4078: `java.desktop` module is no longer optional
+  (2.16.0)

release-notes/VERSION-2.x

@@ -56,6 +56,9 @@ Project: jackson-databind
 #4056: Provide the "ObjectMapper.treeToValue(TreeNode, TypeReference)" method
  (contributed by @fantasy0v0)
 #4060: Expose `NativeImageUtil.isRunningInNativeImage()` method
+#4078: `java.desktop` module is no longer optional
+ (reported by Andreas Z)
+ (fix contributed by Joo-Hyuk K)
 
 2.15.3 (not yet released)