Update notes for submitted changes

* res_pjsip_session: Preserve label on incoming re-INVITE.

67/77ec03406e8b10c5bb8bce5bbb47a7f7f1bdbb

@@ -0,0 +1,9 @@
+Code-Review+1: George Joseph <gjoseph@digium.com>
+Code-Review+1: Benjamin Keith Ford <bford@digium.com>
+Code-Review+2: Kevin Harwell <kharwell@digium.com>
+Verified+2: Friendly Automation
+Submitted-by: Friendly Automation
+Submitted-at: Thu, 18 Jun 2020 17:47:59 -0500
+Reviewed-on: https://gerrit.asterisk.org/c/asterisk/+/14586
+Project: asterisk
+Branch: refs/heads/certified/16.8