add EMNIST in the docs sidebar

Author: Pangoraw

docs/make.jl

@@ -25,6 +25,7 @@ makedocs(
         "Available Datasets" => Any[
             "Vision" => Any[
                 "MNIST" => "datasets/MNIST.md",
+                "EMNIST" => "datasets/EMNIST.md",
                 "FashionMNIST" => "datasets/FashionMNIST.md",
                 "CIFAR-10" => "datasets/CIFAR10.md",
                 "CIFAR-100" => "datasets/CIFAR100.md",
@@ -56,4 +57,4 @@ makedocs(
 )
 
 
-deploydocs(repo = "github.com/JuliaML/MLDatasets.jl.git")
+deploydocs(repo = "github.com/JuliaML/MLDatasets.jl.git")