Update notes for submitted changes

* app_mixmonitor: cleanup datastore when monitor thread fails to launch

3b/cf4833738edc6fd542049713fa74837fc98657

@@ -0,0 +1,9 @@
+Code-Review+1: Joshua Colp <jcolp@sangoma.com>
+Code-Review+1: Sean Bright <sean.bright@gmail.com>
+Code-Review+2: George Joseph <gjoseph@digium.com>
+Verified+2: George Joseph <gjoseph@digium.com>
+Submitted-by: George Joseph <gjoseph@digium.com>
+Submitted-at: Wed, 06 Jan 2021 10:51:49 -0600
+Reviewed-on: https://gerrit.asterisk.org/c/asterisk/+/15275
+Project: asterisk
+Branch: refs/heads/master