Fix 404 error in finance document emails

- Update invalid 'finance.show' route to the correct 'admin.finance.show' in email templates.
- This prevents broken links in approval, rejection, and status update emails.

resources/views/emails/finance/rejected.blade.php

@@ -20,7 +20,7 @@ Your finance document has been rejected.
 {{ $document->rejection_reason }}
 @endif
 
-<x-mail::button :url="route('finance.show', $document)">
+<x-mail::button :url="route('admin.finance.show', $document)">
 View Document
 </x-mail::button>