Update README.md

Author: pH-7

README.md

@@ -2,18 +2,18 @@
 
 **Simple PHP package to easily send the right HTTP header responses to the browser 🐘**
 
-- [⚙️ Requirement](#requirement)
-- [📦 Installation](#installation)
+- [⚙️ Requirement](#-requirement)
+- [📦 Installation](#-installation)
 - [🪄 Examples](#-usage---examples)
 - [👨‍🍳 Who is the baker?](#-who-baked-this)
 - [📺 Me building this package](#me-building-this-package-)
 - [⚖️ License](#%EF%B8%8F-license)
 
-## Requirement
+## ⚙️ Requirement
  * [PHP v8.0](https://www.php.net/releases/8.0/en.php) or higher 🚀
 
 
-## Installation
+## 📦 Installation
 
 The simplest way to add this library to your project, is with Composer