WASHINGTON — Republican Sens. Lisa Murkowski and Mitt Romney say they will vote to confirm Judge Ketanji Brown Jackson’s historic elevation to the Supreme Court, giving President Joe Biden’s nominee a burst of bipartisan support and all but assuring she’ll become the first Black female justice.The senators from Alaska and Utah announced their decisions Monday night ahead of a procedural vote to advance the nomination and as Democrats pressed to confirm Jackson by the end of the week.GOP Sen. Susan …