Fix mailing lists adresses

Author: rougier

README.html

@@ -1116,8 +1116,8 @@ <h2>Galleries</h2>
 </div>
 <div class="section" id="mailing-lists">
 <h2>Mailing lists</h2>
-<p>Finally, there is a <a class="reference external" href="https://lists.sourceforge.net/lists/listinfo/matplotlib-users">user mailing list</a> where you can
-ask for help and a <a class="reference external" href="https://lists.sourceforge.net/lists/listinfo/matplotlib-devel">developers mailing list</a> that is more
+<p>Finally, there is a <a class="reference external" href="https://mail.python.org/mailman/listinfo/matplotlib-users">user mailing list</a> where you can
+ask for help and a <a class="reference external" href="https://mail.python.org/mailman/listinfo/matplotlib-devel">developers mailing list</a> that is more
 technical.</p>
 </div>
 </div>

README.rst

@@ -1314,9 +1314,9 @@ Mailing lists
 --------------
 
 Finally, there is a `user mailing list
-<https://lists.sourceforge.net/lists/listinfo/matplotlib-users>`_ where you can
+<https://mail.python.org/mailman/listinfo/matplotlib-users>`_ where you can
 ask for help and a `developers mailing list
-<https://lists.sourceforge.net/lists/listinfo/matplotlib-devel>`_ that is more
+<https://mail.python.org/mailman/listinfo/matplotlib-devel>`_ that is more
 technical.