fix(leaderboard): increase skeleton row loading indicators to 6

Expand the number of loading skeleton circles in the entries table's
skeleton row from 3 to 6. This enhances the loading state to better
match the expected content layout and improve visual consistency while
data is being fetched.

Author: rohitpaulk

app/components/leaderboard-page/entries-table/skeleton-row.hbs

@@ -16,7 +16,7 @@
         </div>
       </div>
       <div class="hidden md:flex items-center gap-1.5 flex-shrink-0 opacity-25 group-hover/table-row:opacity-100">
-        {{#each (repeat 3)}}
+        {{#each (repeat 6)}}
           <div class="flex h-4 w-4">
             <LoadingSkeleton @isCircle={{true}} />
           </div>