Mention a couple of examples for Functors.jl

Author: Saransh-cpp

docs/src/models/functors.md

@@ -2,14 +2,16 @@
 
 Flux models are deeply nested structures, and [Functors.jl](https://github.com/FluxML/Functors.jl) provides tools needed to explore such objects, apply functions to the parameters they contain, and re-build them.
 
-Functors.jl is a collection of tools designed to represent a [functor](https://en.wikipedia.org/wiki/Functor_(functional_programming)). Flux makes use of it to treat certain structs as functors. Notable examples include the layers that Flux defines.
+More precisely, using the `Functors.@functor` macro allows `Flux` layers to access additional functionalities, like collecting parameters or scaling them to the GPU.
+
+Functors.jl is a collection of tools designed to represent a [functor](https://en.wikipedia.org/wiki/Functor_(functional_programming)). Flux makes use of it to treat certain structs as functors. Notable examples include the layers that Flux defines. The basic usage of `Functors.jl` can be found [here](https://fluxml.ai/Functors.jl/stable/#Basic-Usage-and-Implementation).
 
 ```@docs
+Functors.@functor
+Functors.fmap
 Functors.isleaf
 Functors.children
 Functors.fcollect
 Functors.functor
-Functors.@functor
-Functors.fmap
 Functors.fmapstructure
 ```