fix test snapshot

Author: kkartunov

__tests__/shared/components/challenge-detail/Submissions/SubmissionRow/SubmissionHistoryRow/__snapshots__/index.jsx.snap

@@ -54,7 +54,7 @@ exports[`Matches shallow shapshot shapshot 1 1`] = `
       <div>
         06 Nov 2017
          
-        17:49:35
+        15:49:35
       </div>
     </div>
     <div