It not a very good idea to print data in Triggers, If you want to know how many updated are you should have a log table in which multiple rows can get inserted and can be reviewed. Saying so if you still want to print the result set you can do the following
Declare @inserted table ( id int, Name varchar(200))
Declare @v_print as varchar(500) = ''
insert into @inserted
Select 1, 'DT' union all
select 2, 'DT'
Select @v_print = @v_print +'ID:'+ Cast(id as varchar(20)) + ', Name = ' + Name + '
'
from @inserted
print @v_print