Update notes for submitted changes

* channels: Don't dereference NULL pointer

e8/31952ebac04042051538e444dfb917782b01c4

@@ -0,0 +1,9 @@
+Code-Review+1: Joshua Colp <jcolp@sangoma.com>
+Code-Review+1: Benjamin Keith Ford <bford@digium.com>
+Code-Review+2: George Joseph <gjoseph@digium.com>
+Verified+2: Friendly Automation
+Submitted-by: Friendly Automation
+Submitted-at: Wed, 30 Sep 2020 07:58:54 -0500
+Reviewed-on: https://gerrit.asterisk.org/c/asterisk/+/15007
+Project: asterisk
+Branch: refs/heads/master