Incorrect wording on branch-specific notice setup

From https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=20771

On this page: https://koha-community.org/manual/17.11/html/03_tools.html, this statement is not true:

"Important

When working with the overdue notices you want each notice at each branch to have a unique code. Think about using the branch code in front of the notice code for each branch."