[FIX] purchase: wrong uom in demo data
[FIX] purchase: wrong uom in demo data

closes odoo/odoo#34099

Signed-off-by: Simon Lejeune (sle) <1969d8dff896674c2d819e813f5e88ca826229ab@openerp.com>
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo