Before this commit, since the commit [1] changing the field registry,
the component used for the `kanban.many2many_avatar_user` widget is not
right one.
This commit fixes the issue by setting the right component for the
widget.
[1] 9f4622492c
closes odoo/odoo#112925
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>