Ridgefield residents have approved a budget with a 3.22 percent increase in spending.  Just under 7-percent of eligible voters cast ballots on Tuesday for the $156 million municipal and school plan.  The town operating budget passed by a vote of 975-to-208, while the school spending plan was approved on a 860-to-321 vote.  The mill rate will be 28.43, a .77 percent tax rate increase over the current year.