fix links

Author: PoojaB26

docs/ff-integrations/notifications/one-signal/one-signal.md

@@ -109,7 +109,7 @@ You can find out if the user was successfuly added to the subscription by naviga
 ![img_2.png](img_2.png)
 
 :::info[OneSignal for Supabase Users]
-Currently, Our OneSignal integration supports Firebase authentication. If you want to use Supabase authentication, you may need to provide custom code to notify your users for now.
+Currently, our OneSignal integration supports only Firebase authentication. If you want to use [**Supabase authentication**](../../authentication/supabase-auth/initial-setup.md), you may need to use [**custom code**](../../../ff-concepts/adding-customization/custom-code.md) to notify your users.
 :::