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

note: module: website_crm_livechat
en: Discussion Channel
nb: Diskusjonskanal

note: module: website_crm_livechat
en: Lead/Opportunity
nb: Lead/mulighet

note: module: website_crm_livechat
en: Sessions
nb: Økter
