[FIX] website_portal: fix 403 when changing account details

A portal user couldn't change his address details if he was
of type `contact`

This happens because users usually
have no access to write their parent company.

opw-688192
Closes #13430

addons/website_portal/controllers/main.py

@@ -46,7 +46,7 @@ class website_account(http.Controller):
                         'country_id': post.pop('country_id'),
                         'state_id': post.pop('state_id')
                     }
-                    partner.commercial_partner_id.write(address_fields)
+                    partner.commercial_partner_id.sudo().write(address_fields)
                 partner.sudo().write(post)
                 if redirect:
                     return request.redirect(redirect)