[FIX] account: preview not displayed when uploading a pdf

Steps to reproduce:
1. Customer invoices
2. Upload button
3. Choose a PDF
4. The created invoice does not display the pdf preview

Related commits: a6447663 and 0ab0a92360ba1abe85d0405957d4ed6c6296f8c1

closes odoo/odoo#109092

Signed-off-by: Laurent Smet <las@odoo.com>

addons/account/models/account_journal.py

@@ -641,6 +641,7 @@ class AccountJournal(models.Model):
             if not invoice:
                 invoice = self.env['account.move'].create({})
             invoice.with_context(no_new_invoice=True).message_post(attachment_ids=[attachment.id])
+            attachment.write({'res_model': 'account.move', 'res_id': invoice.id})
             invoices += invoice
         return invoices