Update guest-user.md (#106)
Update guest-user.md (#106)

* Update guest-user.md

We had a very difficult time locating where in the administrator to perform the enable of the guest user. Would have loved a screenshot! :)

* Update guest-user.md

Co-authored-by: Milen Elkin <7a6bf4a8f8cbf8f5c023b28fb7f1f43026d14c62@progress.com>
telerik/report-server-docs