Update notes for submitted changes

* ChanIsAvail() generates a CDR when unanswered=yes in cdr.conf.

94/62722b17c96ad8e2ed6dc04e5d95d36911a694

@@ -0,0 +1,9 @@
+Code-Review+1: Kevin Harwell <kharwell@digium.com>
+Code-Review+1: Joshua Colp <jcolp@digium.com>
+Code-Review+2: George Joseph <gjoseph@digium.com>
+Verified+2: Friendly Automation
+Submitted-by: Friendly Automation
+Submitted-at: Wed, 11 Sep 2019 09:02:11 -0500
+Reviewed-on: https://gerrit.asterisk.org/c/asterisk/+/12860
+Project: asterisk
+Branch: refs/heads/13