feat(telecom.sms.sender): update alert message for sms sender

Ref: UXCT-188

Author: Stephanie Moallic

packages/manager/modules/sms/src/senders/add/telecom-sms-senders-add.html

@@ -75,6 +75,7 @@ <h4 data-translate="sms_senders_add_sender_info_timetable_validation"></h4>
                          role="alert">
                         <strong class="text-uppercase" data-translate="sms_senders_add_sender_warning_title"></strong>
                         <p data-translate="sms_senders_add_sender_warning_text"></p>
+                        <p data-translate="sms_senders_add_sender_warning_text_nichandle"></p>
                     </div>
 
                     <!-- Sender -->
@@ -280,8 +281,9 @@ <h4 data-translate="sms_senders_add_sender_info_timetable_validation"></h4>
                 <div data-ng-if="SmsSendersAddCtrl.choice === 'domain'">
 
                     <div class="alert alert-info"
-                         role="alert"
-                         data-translate="sms_senders_add_sender_warning_text_domains">
+                         role="alert">
+                        <p data-translate="sms_senders_add_sender_warning_text_domains"></p>
+                        <p data-translate="sms_senders_add_sender_warning_text_nichandle"></p>
                     </div>
 
                     <button