Fix localCompare error on event leaderboard

ui/events/Leaderboard.tsx

@@ -56,8 +56,8 @@ export default function EventLeaderboard({ id }: { token: string; id: number })
                     <span className="text-sm text-muted">
                       {group.players
                         ?.map((p) => p.pseudo)
-                        .sort((a, b) => a.localeCompare(b))
-                        .join(', ')}
+                        .sort()
+                        .join(', ') || 'Pas de joueurs'}
                     </span>
                   </div>
                 </div>