Documentation: Remove confusing root-project-name in 'Delegating group' section

Based on introductory section of about page, root project is a project
which inherits from All-Projects. This definition also agrees with
plugin source code.

So, using root-project-name in delegating group is not correct since
this project will be inherited from non All-Projects parent project.

Change-Id: Id26667292b06d7059e1f3b2624ac54bfc5b63d1e
diff --git a/src/main/resources/Documentation/about.md b/src/main/resources/Documentation/about.md
index 8b5ffc9..7c0d4b4 100644
--- a/src/main/resources/Documentation/about.md
+++ b/src/main/resources/Documentation/about.md
@@ -87,9 +87,9 @@
 - Click `Publish` button, review, vote and submit the change to apply new
 configuration
 
-Ownership of a project created by delegated user is given automatically to that
-user by adding him to a group named `<root-project-name>-admins`. It is
-possible to disable granting the ownership by configuring
+Ownership of a project `<project-name>` created by delegated user is given
+automatically to that user by adding him to a group named `<project-name>-admins`.
+It is possible to disable granting the ownership by configuring
 `disableGrantingProjectOwnership` in the `project.config` of
 `refs/meta/config` branch of the parent project: