Update notes for submitted changes

* alembic: fix erroneous commit for add_prune_on_boot

cf/8bf2e7e9705a455e510d1368f12fd26fbe2ab4

@@ -0,0 +1,9 @@
+Code-Review+1: Joshua Colp <jcolp@digium.com>
+Code-Review+1: Florian Floimair <f.floimair@commend.com>
+Code-Review+2: Kevin Harwell <kharwell@digium.com>
+Verified+2: Joshua Colp <jcolp@digium.com>
+Submitted-by: Joshua Colp <jcolp@digium.com>
+Submitted-at: Thu, 07 Sep 2017 12:19:52 -0500
+Reviewed-on: https://gerrit.asterisk.org/6436
+Project: asterisk
+Branch: refs/heads/15.0