Under Add existing user plugin, o a link jumps to edublogs website

I was testing the Add Existing Plugin, and I found out that the following statement points to edublogs.org help contents:

To add users simply enter each user’s email and select a role for them on this blog – you can find out more about different levels of access for different roles here.

How to change this later once my help contents are ready?

Thank you,

Imad