[FIX] website: set correct value in frontend_lang cookie

Before this commit, the `url_code` field value was stored in the cookie instead
of the `code` field.
This was making the language selector in the frontend to not change the lang
correctly when trying to access the website default lang, ONLY for the lang
having an `url_code` different than its `code` value (typically the case for
principal languages).

Step to reproduce:
  - Add `fi_FI` as main lang on website
  - Visit frontend and change lang to `Suomi`, it won't change

This behavior was only related to the language switcher. It did not affect
dispatching (if correct lang in url) and nearest lang finder.

Fixes #41522

closes odoo/odoo#41728

X-original-commit: b62b2828552abb38c8adc74c69cb427c3fd98605
Signed-off-by: Romain Derie (rde) <rde@odoo.com>

0 files changed, 0 insertions, 0 deletions