Update setup.md

Author: lorenzoh

docs/setup.md

@@ -4,7 +4,7 @@ FastAI.jl is a **Julia** package. You can download Julia from the [official webs
 
 ```julia
 using Pkg
-Pkg.add(Pkg.PackageSpec(url="https://github.com/FluxML/FastAI.jl"))
+Pkg.add("FastAI")
 ```
 
 **Plotting** FastAI.jl also defines [Makie.jl](https://github.com/JuliaPlots/Makie.jl) plotting recipes to visualize data. If you want to use them, you'll have to install and one of the Makie.jl backends [CairoMakie.jl](https://github.com/JuliaPlots/CairoMakie.jl), [GLMakie.jl](https://github.com/JuliaPlots/GLMakie.jl) or [WGLMakie.jl](https://github.com/JuliaPlots/WGLMakie.jl). For example:
@@ -23,4 +23,4 @@ using Pkg
 Pkg.add(Pkg.PackageSpec(url="https://github.com/darsnack/Metalhead.jl", rev="darsnack/vision-refactor")
 ```
 
-**Threaded data loading** To make use of multi-threaded data loading, you need to start Julia with multiple threads, either with the `-t auto` commandline flag or by setting the environment variable `JULIA_NUM_THREADS`. See the [IJulia.jl documentation](https://julialang.github.io/IJulia.jl/dev/manual/installation/#Installing-additional-Julia-kernels) for instructions on setting these for Jupyter notebook kernels.
+**Threaded data loading** To make use of multi-threaded data loading, you need to start Julia with multiple threads, either with the `-t auto` commandline flag or by setting the environment variable `JULIA_NUM_THREADS`. See the [IJulia.jl documentation](https://julialang.github.io/IJulia.jl/dev/manual/installation/#Installing-additional-Julia-kernels) for instructions on setting these for Jupyter notebook kernels.