archwiki: Preserve query parameters when redirecting to the new short URL

Ex: https://wiki.archlinux.org/index.php/Special:Search?search=systemd

roles/archwiki/templates/nginx.d.conf.j2

@@ -54,7 +54,7 @@ server {
 
     # Redirect old URLs to the new short-url (/title/<page>)
     location ~ ^/index.php/(.*)$ {
-        return 301 /title/$1;
+        return 301 /title/$1$is_args$args;
     }
 
     # Handling for the article path (pretty URLs)