Add information on support requests to privacy

privacy.html

@@ -113,6 +113,12 @@
             service will have a dedicated privacy policy, please consult that if
             you have any specific questions.
           </li>
+          <li>
+            If you send a support request to us, we will store your email
+            address and any other data you provide to us for up to 30 days in
+            our support system. After that, the data will be deleted
+            automatically.
+          </li>
         </ul>
         <h2>What are your data protection rights?</h2>
         <p>You have the following data protection rights:</p>