Update notes for submitted changes

* func_math: Three new dialplan functions

91/06c9d1f1f514a640fe10c9d4f3ae616d177ec3

@@ -0,0 +1,10 @@
+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>
+Code-Review+1: George Joseph <gjoseph@digium.com>
+Verified+2: Friendly Automation
+Submitted-by: Friendly Automation
+Submitted-at: Wed, 26 May 2021 13:47:56 -0500
+Reviewed-on: https://gerrit.asterisk.org/c/asterisk/+/15905
+Project: asterisk
+Branch: refs/heads/18