Update notes for submitted changes

* app_voicemail.c: Ability to silence instructions if greeting is present.

f6/7b72093e1cf5acb39600cef0bd135187f20dfb

@@ -0,0 +1,9 @@
+Code-Review+1: Joshua Colp <jcolp@sangoma.com>
+Code-Review+2: Kevin Harwell <kharwell@digium.com>
+Code-Review+1: Benjamin Keith Ford <bford@digium.com>
+Verified+2: Friendly Automation
+Submitted-by: Friendly Automation
+Submitted-at: Wed, 08 Sep 2021 19:18:14 -0500
+Reviewed-on: https://gerrit.asterisk.org/c/asterisk/+/16443
+Project: asterisk
+Branch: refs/heads/19