Add Discord badge in README.md

Author: Panquesito7

README.md

@@ -3,6 +3,7 @@
 ![golangci-lint](https://github.com/TheAlgorithms/Go/workflows/golangci-lint/badge.svg)
 ![](https://img.shields.io/github/repo-size/TheAlgorithms/Go.svg?label=Repo%20size&style=flat-square) 
 ![update_directory_md](https://github.com/TheAlgorithms/Go/workflows/update_directory_md/badge.svg)
+[![Discord chat](https://img.shields.io/discord/808045925556682782.svg?logo=discord&colorB=7289DA&style=flat-square)](https://discord.gg/c7MnfGFGa6) 
 
 ### Algorithms implemented in Go (for education)