Odoo Server saas~15.3 - en to km translation catalogue (3 entries)

note: module: website_crm_livechat
en: Discussion Channel
km: ប៉ុស្តិ៍ពិភាក្សា

note: module: website_crm_livechat
en: Lead/Opportunity
km: Leads/ឱកាស

note: module: website_crm_livechat
en: Sessions
km: សម័យ
