doc(release): adding to release notes

Signed-off-by: Raphael Defosseux <raphael.defosseux@openairinterface.org>

CHANGELOG.md

@@ -25,6 +25,7 @@
   * Fix Protocol identifier Selected Bearer Control Mode
   * Fix issue for Static UE IP Addr
   * Fix URR ID in IE Create URR (post UPF graph implementation)
+  * Fix issue for Full DNN (APN Operator Identifier)
 * Docker image improvements
   * Fixed docker exit by catching SIGTERM
   * release mode does not use libasan anymore --> allocation of 20T virtual memory is no longer done