Money to revitalize downtown Myrtle Beach is again one of the House's largest earmarks in a state budget that legislators are still negotiating. In this photo, people walk along the beach the morning of May 29, 2021, in Myrtle Beach. (File photo by Sean Rayford/Getty Images)COLUMBIA — A historic bridge, improvements to Myrtle Beach’s downtown and a center to learn about Medal of Honor recipients are the top recipients of more than $300 million t…