fix(setup): admin users should not receive admin granting email

They are already admin users so don't send a mail each time
`discourse.setup.users` state is run.

discourse/sources/files/default/rake.autosetup.template.yml

@@ -62,14 +62,16 @@ run:
          end
        
          if is_admin
-           user.grant_admin!
+           if  not user.admin
+             user.grant_admin!
+             user.email_tokens.update_all confirmed: true
+           end
            if user.trust_level < 1
              user.change_trust_level!(1)
            end
-           user.email_tokens.update_all confirmed: true
            user.activate
        
-           puts "User #{args[:email]}: account now has Admin privileges!"
+           puts "User #{args[:email]}: account has Admin privileges!"
          else
            user.revoke_admin!
            if user.trust_level < 1
@@ -78,6 +80,6 @@ run:
            user.email_tokens.update_all confirmed: true
            user.activate
        
-           puts "User #{args[:email]}: account now has User privileges!"
+           puts "User #{args[:email]}: account has Regular privileges!"
          end
        end