Fix edx-ace templates

This patch is part of multiple PR's to
protect templates against xss attack

PROD-465

openedx/core/djangoapps/user_api/templates/user_api/edx_ace/deletionnotificationmessage/email/body.html

@@ -6,30 +6,40 @@
     <tr>
         <td>
             <p>
+                {% filter force_escape %}
                 {% blocktrans trimmed %}
                     Hello {{full_name}},
                 {% endblocktrans %}
+                {% endfilter %}
             </p>
             <p>
+                {% filter force_escape %}
                 {% blocktrans trimmed %}
                 We received a deletion request for your account on {{platform_name}}. We're sorry to see you go!
                 {% endblocktrans %}
+                {% endfilter %}
             </p>
             <p>
+                {% filter force_escape %}
                 {% blocktrans trimmed %}
                 Your account will be deleted shortly. Account deletion, including removal from email lists, may take a few weeks to fully process through our system. If you want to opt-out of emails before then, please unsubscribe from the footer of any email.
                 {% endblocktrans %}
+                {% endfilter %}
             </p>
             <p>
+                {% filter force_escape %}
                 {% blocktrans trimmed %}
                 This is an informational email only. If you did not initiate this request, please contact {{contact_email}}.
                 {% endblocktrans %}
+                {% endfilter %}
             </p>
             <p>
+                {% filter force_escape %}
                 {% blocktrans trimmed %}
                 Best,
                 {{ platform_name }}
                 {% endblocktrans %}
+                {% endfilter %}
             </p>
         </td>
     </tr>