Having received newly-available state funding, Atlantic City will use its $20 million allocation from New Jersey’s boardwalk fund on an overhaul of an area between three casinos at the city’s northern end. City officials announced Tuesday the money will be used for the boardwalk between New Jersey and Tennessee avenues. Resorts Casino Hotel, Showboat and Hard Rock are all within that span. The project follows Gov. Phil Murphy including in the state budget $100 million for boardwalk upkeep along the Jersey Shore. Both Atlantic City and Asbury Park each received $20 million from the fund, the hi…