Update savepoints.rb

Author: aidanharan

lib/active_record/connection_adapters/sqlserver/savepoints.rb

@@ -16,7 +16,7 @@ def exec_rollback_to_savepoint(name = current_savepoint_name)
           internal_execute("ROLLBACK TRANSACTION #{name}", "TRANSACTION")
         end
 
-        def release_savepoint(_name)
+        def release_savepoint(name)
           internal_execute("/* release #{name} savepoint */", "TRANSACTION")
         end
       end