changelog updates

CHANGELOG.md

+- Role: analytics-api
+  - Added a new role for the analytics-api Django app.  Currently a private repo
+
 - Logrotation now happens hourly by default for all logs.
 
 - Role: xqwatcher, xqueue, nginx, edxapp, common
   - Moving nginx basic authorization flag and credentials to the common role
+  - Basic auth will be turned on by default
 
 - Role: Edxapp
   - Turn on code sandboxing by default and allow the jailed code to be able to write
@@ -11,6 +15,6 @@
   - The repo.txt requirements file is no longer being processed in anyway.  This file was removed from edxplatform
     via pull #3487(https://github.com/edx/edx-platform/pull/3487)
 
-- Update CMS_HOSTNAME default to allow any hostname that starts with `studio` along with `prod-studio` or `stage-studio`.
+- Update `CMS_HOSTNAME` default to allow any hostname that starts with `studio` along with `prod-studio` or `stage-studio`.
 
 - Start a change log to keep track of backwards incompatible changes and deprecations.