Fix “reset” button of instance filter switching to custom emoji admin panel (mastodon#10076)

Author: ClearlyClaire

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

@@ -23,7 +23,7 @@
 
     .actions
       %button= t('admin.accounts.search')
-      = link_to t('admin.accounts.reset'), admin_custom_emojis_path, class: 'button negative'
+      = link_to t('admin.accounts.reset'), admin_instances_path, class: 'button negative'
 
 %hr.spacer/