doc correction economic function signature

Author: franckgaga

src/controller/nonlinmpc.jl

@@ -123,7 +123,7 @@ This method uses the default state estimator :
 - `Lwt=fill(0.0,model.nu)` : main diagonal of ``\mathbf{L}`` weight matrix (vector).
 - `Cwt=1e5` : slack variable weight ``C`` (scalar), use `Cwt=Inf` for hard constraints only.
 - `Ewt=0.0` : economic costs weight ``E`` (scalar). 
-- `JE=(_,_,_)->0.0` : economic function ``J_E(\mathbf{U}_E, \mathbf{D̂}_E, \mathbf{Ŷ}_E)``.
+- `JE=(_,_,_)->0.0` : economic function ``J_E(\mathbf{U}_E, \mathbf{Ŷ}_E, \mathbf{D̂}_E)``.
 - `ru=model.uop` : manipulated input setpoints ``\mathbf{r_u}`` (vector).
 - `optim=JuMP.Model(Ipopt.Optimizer)` : nonlinear optimizer used in the predictive
    controller, provided as a [`JuMP.Model`](https://jump.dev/JuMP.jl/stable/reference/models/#JuMP.Model)