pkg update step

docs/src/index.md

@@ -19,8 +19,8 @@ The sections on [Recurrence](models/recurrent.html), [Debugging](models/debuggin
 *... Charging Ion Capacitors ...*
 
 ```julia
+Pkg.update()
 Pkg.add("Flux.jl")
-using Flux
 ```
 
 You'll also need a backend to run real training, if you don't have one already. Choose from [MXNet](https://github.com/dmlc/MXNet.jl) or [TensorFlow](https://github.com/malmaud/TensorFlow.jl) (MXNet is the recommended option if you're not sure):