manual: rename user added to networkmanager from "youruser" to "alice"

to be consistent with the rest of the manual

Reported-By: Cedric Shahabi <cedric.shahabi@gmail.com>

Changed files
+1 -1
nixos
doc
manual
configuration
+1 -1
nixos/doc/manual/configuration/network-manager.xml
···
All users that should have permission to change network settings must belong
to the <code>networkmanager</code> group:
<programlisting>
-
<link linkend="opt-users.users._name__.extraGroups">users.users.youruser.extraGroups</link> = [ "networkmanager" ];
+
<link linkend="opt-users.users._name__.extraGroups">users.users.alice.extraGroups</link> = [ "networkmanager" ];
</programlisting>
</para>