Which term is defined as the government setting the maximum amount that a property owner can change that the tenant?

The term you are referring to is "rent control." Rent control is a regulatory measure where the government limits the amount a landlord can charge for renting out a property, often to ensure affordable housing for tenants and prevent sudden increases in rent that could lead to displacement. These regulations vary by jurisdiction and can include caps on rent increases, tenant protections, and other related provisions.