Update notes for submitted changes

* channel.c: Resolve issue with receiving SIP INFO packets for DTMF

5a/ee4f76550dffa37c21f95f3583c3ff0be44d46

@@ -0,0 +1,9 @@
+Code-Review+1: Joshua Colp <jcolp@digium.com>
+Code-Review+1: Benjamin Keith Ford <bford@digium.com>
+Code-Review+2: Kevin Harwell <kharwell@digium.com>
+Verified+2: Friendly Automation
+Submitted-by: Friendly Automation
+Submitted-at: Fri, 06 Dec 2019 08:35:01 -0600
+Reviewed-on: https://gerrit.asterisk.org/c/asterisk/+/13303
+Project: asterisk
+Branch: refs/heads/13