Add attributes for sanitize on unsubscribe link section

In the comments and direct message emails, the "attributes" was
missing and in the reply email it was not in the right place.

app/views/mailer/comment.html.erb

@@ -25,6 +25,6 @@
         style: "color: #2895F1; text-decoration: none;"
       ),
       notification: User.human_attribute_name(:email_on_comment)
-    )) %>
+    ), attributes: %w[href style]) %>
   </p>
 </td>

app/views/mailer/direct_message_for_receiver.html.erb

@@ -25,6 +25,7 @@
     <%= sanitize(t("mailers.direct_message_for_receiver.unsubscribe_text",
         notifications: link_to(t("mailers.config.notifications_link"),
                         edit_subscriptions_url(token: @token),
-                        style: "color: #2895F1; text-decoration: none;"))) %>
+                        style: "color: #2895F1; text-decoration: none;")),
+                        attributes: %w[href style]) %>
   </p>
 </td>

app/views/mailer/newsletter.html.erb

@@ -11,6 +11,6 @@
         style: "color: #2895F1; text-decoration: none;"
       ),
       notification: User.human_attribute_name(:newsletter)
-    )) %>
+    ), attributes: %w[href style]) %>
   </p>
 </td>

app/views/mailer/reply.html.erb

@@ -25,6 +25,6 @@
         style: "color: #2895F1; text-decoration: none;"
       ),
       notification: User.human_attribute_name(:email_on_comment_reply)
-    )) %>
+    ), attributes: %w[href style]) %>
   </p>
 </td>