Update release notes wrt #295

Author: cowtowncoder

release-notes/CREDITS-2.x

@@ -214,3 +214,9 @@ Hunter Herman (hherman1@github)
 
 * Requested #284: Support base64 strings in `getBinaryValue()` for CBOR and Smile
  (2.13.0)
+
+Martin Giannechini (MartinGian@github)
+
+* Contributed fix for #295: (ion) `jackson-dataformat-ion` does not handle null.struct
+  deserialization correctly
+ (2.13.0)

release-notes/VERSION-2.x

@@ -34,6 +34,8 @@ Modules:
 #290: (avro) Generate logicalType switch
  (contributed by Michal F)
 #291: (smile) `ArrayIndexOutOfBounds` for truncated UTF-8 name
+#295: (ion) `jackson-dataformat-ion` does not handle null.struct deserialization correctly
+ (contributed by Martin G)
 - `Ion-java` dep 1.4.0 -> 1.8.0
 - Minor change to Ion module registration names (fully-qualified)