Update notes for submitted changes

* .gitreview:  Update defaultbranch for certified

1e/9a9e4dca149d6b17b6565e74ad73c03289a287

@@ -0,0 +1,10 @@
+Verified+1: George Joseph <gjoseph@digium.com>
+Code-Review+1: Benjamin Keith Ford <bford@digium.com>
+Code-Review+1: Kevin Harwell <kharwell@digium.com>
+Code-Review+2: Joshua Colp <jcolp@digium.com>
+Verified+2: Joshua Colp <jcolp@digium.com>
+Submitted-by: Joshua Colp <jcolp@digium.com>
+Submitted-at: Mon, 29 Jul 2019 04:57:17 -0500
+Reviewed-on: https://gerrit.asterisk.org/c/asterisk/+/11630
+Project: asterisk
+Branch: refs/heads/certified/13.21