Fix admin UI view of local followers (#9712)

Regression from #9700

app/views/admin/followers/index.html.haml

@@ -23,6 +23,6 @@
         %th= t('admin.accounts.most_recent_activity')
         %th
     %tbody
-      = render partial: 'admin/accounts/account', collection: @followers.map(&:account)
+      = render partial: 'admin/accounts/account', collection: @followers
 
 = paginate @followers