[FIX] website: Add onchange language_ids on website model
[FIX] website: Add onchange language_ids on website model

On res.config.settings for website, when removing a language from language_ids, if this language is defined as default_lang_id, the default language will be updated by an onchange to prevent any inconsistency.
The same should happen when doing this directly on the form view of a website record.

closes odoo/odoo#27727
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo