[FIX] product: Rename invalid context variable
[FIX] product: Rename invalid context variable

The context uses an invalid name, which means it'll never work correctly.

fixes #15028

Bug coming from the module migration

hip-odoo/odoo,hip-odoo/odoo,hip-odoo/odoo,dfang/odoo,ygol/odoo,ygol/odoo,dfang/odoo,hip-odoo/odoo,hip-odoo/odoo,ygol/odoo,ygol/odoo,ygol/odoo,hip-odoo/odoo,dfang/odoo,ygol/odoo,dfang/odoo,dfang/odoo,dfang/odoo,ygol/odoo