Update notes for submitted changes

* documentation: Add information on running install_prereq script in readme

45/9d6f7ad24f3c09ed1347f3b548ada55d1e8d15

@@ -0,0 +1,9 @@
+Code-Review+1: Joshua Colp <jcolp@sangoma.com>
+Code-Review+1: Kevin Harwell <kharwell@digium.com>
+Code-Review+2: Benjamin Keith Ford <bford@digium.com>
+Verified+2: Friendly Automation
+Submitted-by: Friendly Automation
+Submitted-at: Mon, 28 Mar 2022 11:32:06 -0500
+Reviewed-on: https://gerrit.asterisk.org/c/asterisk/+/18271
+Project: asterisk
+Branch: refs/heads/19