Update src/ad.jl

Co-authored-by: Christopher Rackauckas <accounts@chrisrackauckas.com>

Author: m-bossart

lib/SimpleNonlinearSolve/src/ad.jl

@@ -42,7 +42,7 @@ for algType in (Bisection, Brent, Alefeld, Falsi, ITP, Ridder)
 end
 
 function __nlsolve_ad(
-        prob::Union{IntervalNonlinearProblem, ImmutableNonlinearProblem}, alg, args...; kwargs...)
+        prob::Union{IntervalNonlinearProblem, NonlinearProblem, ImmutableNonlinearProblem}, alg, args...; kwargs...)
     p = value(prob.p)
     if prob isa IntervalNonlinearProblem
         tspan = value.(prob.tspan)