Mets fans rejoicing at the Amazin’s snapping their 12-game losing streak didn’t get much time to celebrate before the dread over the Curse of the Mambino came creeping back with a three-letter X post. Mayor Zohran Mamdani posted “LGM” on X after the Mets beat the Twins at Citi Field Wednesday night, spooking scores of superstitious fans concerned Hizzoner would again jinx the baseball team with his praise. The team lost 12 consecutive games after Mamdani hugged mascots Mr. and Mrs. Met on April 9 — finally breaking the unlucky streak with Wednesday’s 3-2 win over the Twins. “Couldn’t just…