They can change the constitutional requirement for the president to be a "natural born citizen" by creating a constitutional amendment, but they cannot change the meaning of "natural born citizen" through a constitutional amendment.
It means what it means, and you can't make it mean something else by passing a law.
Fair point.
When New York, Virginia, North Carolina voted to ratify the new Constitution, they were entitled to a Constitutional term “natural-born Citizen” that had a clear definition and real teeth in terms of excluding all pretenders.
Surely every citizen of this country knew who the pretenders were, and who they weren’t, in 1787-1788!