Fix syntax error in tests

I guess this shows how often people run the tests.

test/foreclojure/test/users.clj

@@ -2,7 +2,7 @@
   (:use [foreclojure.users])
   (:use [clojure.test])
   (:use [midje.sweet])
-  (:use [somnium.congomongo :only [update!]))
+  (:use [somnium.congomongo :only [update!]]))
 
 (def users [{:user "user1", :solved [1 2 3 4] :rank 1}
               {:user "user2", :solved [1 2 3] :rank 2}