Update README with coverage badge

Author: gaby

README.md

@@ -1,10 +1,10 @@
 # Fiber Utils
 
 ![Release](https://img.shields.io/github/release/gofiber/utils.svg)
-[![Discord](https://img.shields.io/badge/discord-join%20channel-7289DA)](https://gofiber.io/discord)
 ![Test](https://github.com/gofiber/utils/workflows/Test/badge.svg)
-![Security](https://github.com/gofiber/utils/workflows/Security/badge.svg)
+![Codecov](https://img.shields.io/codecov/c/github/gofiber/utils?token=3Cr92CwaPQ&style=flat-square&logo=codecov&label=codecov)
 ![Linter](https://github.com/gofiber/utils/workflows/Linter/badge.svg)
+[![Discord](https://img.shields.io/badge/discord-join%20channel-7289DA)](https://gofiber.io/discord)
 
 A collection of common functions but with better performance, less allocations and less dependencies created for [Fiber](https://github.com/gofiber/fiber).