Merge #1208

1208: Fixing output format for `onehot` r=dhairyagandhi96 a=natema

Currently `Flux.OneHotVector` is displayed as a binary vector (0/1) rather than a boolean one (true/false). This is also shown in successive examples in the same page. 
I fixed the `onehot(:b, [:a, :b, :c])` and `onehot(:c, [:a, :b, :c])` outputs in the first example of the page accordingly.


Co-authored-by: natema <natema@users.noreply.github.com>

docs/src/data/onehot.md

@@ -7,15 +7,15 @@ julia> using Flux: onehot, onecold
 
 julia> onehot(:b, [:a, :b, :c])
 3-element Flux.OneHotVector:
- false
-  true
- false
+ 0
+ 1
+ 0
 
 julia> onehot(:c, [:a, :b, :c])
 3-element Flux.OneHotVector:
- false
- false
-  true
+ 0
+ 0
+ 1
 ```
 
 The inverse is `onecold` (which can take a general probability distribution, as well as just booleans).