Update notes for submitted changes

* res_pjsip: Send a 503 response when overload state if reliable transport.

9c/9bc5accaedbf2cdbc6cc8e60bee1080251b5b0

@@ -0,0 +1,10 @@
+Code-Review+1: Richard Mudgett <rmudgett@digium.com>
+Code-Review+1: Joshua Colp <jcolp@digium.com>
+Code-Review+1: Matthew Fredrickson <creslin@digium.com>
+Code-Review+2: Kevin Harwell <kharwell@digium.com>
+Verified+2: Kevin Harwell <kharwell@digium.com>
+Submitted-by: Kevin Harwell <kharwell@digium.com>
+Submitted-at: Thu, 08 Nov 2018 13:05:46 -0600
+Reviewed-on: https://gerrit.asterisk.org/10595
+Project: asterisk
+Branch: refs/heads/16