WASHINGTON — The Senate on Monday confirmed the first appellate court judge of President Joe Biden’s tenure, elevating a judge with strong prospects of landing on the president’s short list should a Supreme Court vacancy arise.Senators voted 53-44 to confirm Ketanji Brown Jackson to serve on the Court of Appeals for the District of Columbia Circuit, the nation’s second most powerful court. She replaces Merrick Garland, who vacated the seat to become Biden’s attorney general.Biden has promised to name a Black woman to the …