This update changes the unit of measure for the 'Flour' product in the Point of Sale system to kilograms. This adjustment is necessary to properly configure product weighing, particularly for compliance with the l10n_eu_iot_scale certification, ensuring accurate inventory tracking.

This small PR sets the "Flour" product's units of measure to kilograms.
This helps to configure the weighing of the product, especially for the l10n_eu_iot_scale cert

Forward-Port-Of: odoo/odoo#270508