Update release notes

Author: cowtowncoder

release-notes/CREDITS

@@ -212,6 +212,9 @@ Lee Jiwon (@dlwldnjs1009)
   [3.1.0]
  * Implemented #5621: Fix typo: MissingInjectableValueExcepion → MissingInjectableValueException
   [3.1.0]
+ * Fixed #5867: Fix `Map.Entry` deserialization for property-level
+   `Shape.NATURAL` override
+  [3.1.0]
 
 Garret Wilson (@garretwilson)
  * Suggested #4157: Add `MapperFeature.INFER_RECORD_GETTERS_FROM_COMPONENTS_ONLY` to ignore

release-notes/VERSION

@@ -19,6 +19,9 @@ No changes since 3.1
   `DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES`
  (reported by Lavender S)
  (fix by @cowtowncoder, w/ Claude code)
+#5867: Fix `Map.Entry` deserialization for property-level
+  `Shape.NATURAL` override
+ (fixed by Lee Jiwon)
 
 3.1.1 (27-Mar-2026)