Not to put a bee in your bonnet–but wouldn't that require a constitutional amendment? Considering that is what originally established the 2 term limit rule?
They can't just pass legislation to circumvent an amendment. Would have to be ratified by the states in time for the election–which would be impossible.
When did the 22nd go into effect though? That's the key.
Congress approved the Twenty-second Amendment on March 21, 1947, and submitted it to the state legislatures for ratification. That process was completed on February 27, 1951, after the amendment had been ratified by the requisite 36 of the then 48 states (neither Alaska nor Hawaii had yet been admitted as states), and its provisions came into force on that date.
https://en.wikipedia.org/wiki/Twenty-second_Amendment_to_the_United_States_Constitution