Update changelog to cover #4197

Signed-off-by: Paul Elliott <paul.elliott@arm.com>
diff --git a/ChangeLog b/ChangeLog
index 087d22e..312e027 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -160,6 +160,8 @@
      applicable RFC: on an invalid Finished message value, an
      invalid max_fragment_length extension, or an
      unsupported extension used by the server.
+   * Correct (change from 12 to 13 bytes) the value of the macro describing the
+     maximum nonce length returned by psa_aead_generate_nonce().
 
 Changes
    * Add extra printf compiler warning flags to builds.