Status: Remove use of deprecated jQuery jqXHR `complete` method

This has been deprecated for a long time, and was removed in
jQuery 3.0 per <https://api.jquery.com/jQuery.ajax/#jqXHR>

jqXHR.always() has been available since jQuery 1.6.

Change-Id: I4498e3b63d07d019db51b4f04a1dd20ebc7c1167
diff --git a/etc/status/public_html/jquery.zuul.js b/etc/status/public_html/jquery.zuul.js
index d973948..46c7785 100644
--- a/etc/status/public_html/jquery.zuul.js
+++ b/etc/status/public_html/jquery.zuul.js
@@ -625,7 +625,7 @@
                     setTimeout(function() {app.schedule(app);}, 5000);
                     return;
                 }
-                app.update().complete(function () {
+                app.update().always(function () {
                     setTimeout(function() {app.schedule(app);}, 5000);
                 });
 
@@ -695,7 +695,7 @@
                             .removeClass('zuul-msg-wrap-off')
                             .show();
                     })
-                    .complete(function () {
+                    .always(function () {
                         xhr = undefined;
                         app.emit('update-end');
                     });