Update notes for submitted changes

* apps/app_dial.c: HANGUPCAUSE reason code for CANCEL is set to AST_CAUSE_NORMAL_CLEARING

fc/321db1f897ae9857690e3bdf29d78b5e215949

@@ -0,0 +1,9 @@
+Code-Review+1: Joshua Colp <jcolp@sangoma.com>
+Code-Review+1: Kevin Harwell <kharwell@digium.com>
+Code-Review+2: George Joseph <gjoseph@digium.com>
+Verified+2: Friendly Automation
+Submitted-by: Friendly Automation
+Submitted-at: Mon, 06 Dec 2021 09:22:14 -0600
+Reviewed-on: https://gerrit.asterisk.org/c/asterisk/+/16346
+Project: asterisk
+Branch: refs/heads/19