[FIX] Define UTC as tz in get_working_days_of_date method
[FIX] Define UTC as tz in get_working_days_of_date method

acsone/project,NeovaHealth/project-service,akretion/project-service,Antiun/project-service,Endika/project,eezee-it/project-service,dreispt/project,dreispt/project-service,xpansa/project-service,OCA/project-service,ddico/project,sergiocorato/project-service,Antiun/project,acsone/project-service