Update notes for submitted changes

* res_stasis_playback: Prevent media_index from going out of bounds

31/dc9043801039647903b3bff44d7988e056dcc2

@@ -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, 05 Feb 2020 10:39:24 -0600
+Reviewed-on: https://gerrit.asterisk.org/c/asterisk/+/13709
+Project: asterisk
+Branch: refs/heads/master