message: [examples/model/fleet_inc] Make it build again
diff: @@ -41,7 +41,7 @@ messages! {
  }
  fn instantiate() -> impl Contract {
  - ContractDecl::new::<Adder>()
  + ContractDecl::using::<Adder>()
  .on_deploy(|env, init_val| {
  env.state.val.set(init_val)
  })
  