If you really want to read what the law says, here's what Sec. 275 of the COVID-Related Tax Relief Act of 202 says.  As you can see, there's no increase to the present limit for deduction:

SEC. 275. REGULATIONS OR GUIDANCE CLARIFYING APPLICATION OF EDUCATOR EXPENSE TAX DEDUCTION.

Not later than February 28, 2021, the Secretary of the Treasury (or the Secretary’s delegate) shall by regulation or other guidance clarify that personal protective equipment, disinfectant, and other supplies used for the prevention of the spread of COVID–19 are treated as described in section 62(a)(2)(D)(ii) of the Internal Revenue Code of 1986. Such regulations or other guidance shall apply to expenses paid or incurred after March 12, 2020.