docs: update Go library to atoous/go-nanoid (#390)

https://github.com/jaevor/go-nanoid license was changed to
GPL. Recommend an alternate implementation.

README.md

@@ -464,7 +464,7 @@ the same ID generator on the client and server side.
 * [Crystal](https://github.com/mamantoha/nanoid.cr)
 * [Dart & Flutter](https://github.com/pd4d10/nanoid-dart)
 * [Deno](https://github.com/ianfabs/nanoid)
-* [Go](https://github.com/jaevor/go-nanoid)
+* [Go](https://github.com/matoous/go-nanoid)
 * [Elixir](https://github.com/railsmechanic/nanoid)
 * [Haskell](https://github.com/MichelBoucey/NanoID)
 * [Haxe](https://github.com/flashultra/uuid)