* Add Root URL info under License file management

Edited through GitHub, not tested on development web server.

* Update docs/sources/enterprise/_index.md

Make updating root_url instructions more straightforward, with action first and explanation second.

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

* Update docs/sources/enterprise/_index.md

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

* Update docs/sources/enterprise/_index.md

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>