Add Mobile security service to aerogear.org

[austincunningham]

Description

The drop down menu and footer on and the aerogear.org home page refer to device security with no reference to mobile security service.

update required for the following repos
https://github.com/aerogear/antora-ui/
https://github.com/aerogear/aerogear.org/

Expected Behavior

A modification to the following PR to change the
aerogear/antora-ui#31
aerogear/aerogear.org#783
to point at the mobile security service area of the docs https://docs.aerogear.org/aerogear/latest/security.html

Actual Behavior

Go to on https://aerogear.org
Describe the current/actual behaviour.

Go to on https://aerogear.org/services/device-security/

Steps to reproduce

Go to on https://aerogear.org
Go to on https://aerogear.org/services/device-security/