Odoo Server 15.5alpha1 - en to cs translation catalogue (4 entries)

note: module: website_event_booth_sale
en: Free
cs: Volný

note: module: website_event_booth_sale
en: Product Variant
cs: Varianta výrobku

note: module: website_event_booth_sale
en: Sales Order
cs: Prodejní objednávka

note: module: website_event_booth_sale
en: Website
cs: Webstránka
