changelog: Move pldm_transport_send_recv_msg() note to Changed

It was mistakenly added under the Added header.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: I96abd712104260e750df6201ce0a5d34fee740a4
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b63b9e1..471449f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,7 +20,10 @@
 ### Added
 
 1. state-set: Add new enum for Operational Fault Status enum
-2. transport: Match specified metadata in pldm_transport_send_recv_msg()
+
+### Changed
+
+1. transport: Match specified metadata in pldm_transport_send_recv_msg()
 
 ## [0.6.0] - 2023-08-22