indicate source of write key and bold item to click

Co-authored-by: forstisabella <[email protected]>

Author: gary-hopkins-listrak

src/connections/sources/catalog/cloud-apps/listrak/index.md

@@ -28,7 +28,7 @@ This source is maintained by Listrak. For any issues with the source, [contact t
 6. Click **New Integration**.
 7. Click the Segment card
 8. Click Setup Integration
-9. Paste the Write key you copied and click Save
+9. Paste the Write key you copied from Segment and click **Save**.
 10. Add at least one email list that you want to sync with Segment and click Save again
 
 ## Components