Update release notes wrt #4787 fix

Author: cowtowncoder

release-notes/VERSION-2.x

@@ -15,6 +15,8 @@ Not yet released:
  (fix contributed by Joo-Hyuk K)
 #4581: Incompatible Constructor Parameter Type in `EnumDeserializer`
  (reported by @Hunter-Lam)
+#4787: Wrong `String.format()` in `StdDelegatingDeserializer` hides actual error
+ (reported by @Horus1337)
 
 2.16.2 (09-Mar-2024)