Update 2drosenbrock.jmd

Author: ChrisRackauckas

benchmarks/Optimization/2drosenbrock.jmd

@@ -113,7 +113,7 @@ Now let's switch over to OptimizationOptimisers with reverse-mode AD
 using OptimizationOptimisers
 optf = OptimizationFunction(rosenbrock, Optimization.AutoZygote())
 prob = OptimizationProblem(optf, x0, _p)
-@btime sol = solve(prob, Adam(0.05), maxiters = 1000, progress = false)
+@btime sol = solve(prob, OptimizationOptimisers.Adam(0.05), maxiters = 1000, progress = false)
 ```
 
 Try out CMAEvolutionStrategy.jl's evolutionary methods