Update notes for submitted changes

* chan_pjsip: digit_begin - constant DTMF tone if RTP is not setup yet

fa/3c8f94e088036836d12a622b7f738d8dd48cc5

@@ -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: Mon, 13 Apr 2020 11:05:20 -0500
+Reviewed-on: https://gerrit.asterisk.org/c/asterisk/+/14163
+Project: asterisk
+Branch: refs/heads/master