Fix formatting in README.md

Author: codehippie1

lib/README.md

@@ -82,7 +82,7 @@ Whether you need a simple embedded PDF viewer or a complex document management s
 - [Features](#-features)
 - [Installation](#-installation)
 - [Basic Usage](#-basic-usage)
-- [Advanced Configuration](#advanced-configuration)
+- [Advanced Configuration](#-advanced-configuration)
 - [API Reference](#-api-reference)
 - [Examples](#-examples)
 - [Migration Guide](#-migration-guide)
@@ -718,4 +718,4 @@ This project is licensed under the **Apache License 2.0 + Commons Clause License
 [![NPM](https://img.shields.io/badge/NPM-Package-red?logo=npm)](https://www.npmjs.com/package/ng2-pdfjs-viewer)
 [![Angular](https://img.shields.io/badge/Angular-Component-green?logo=angular)](https://angular.dev/overview)
 
-</div>
+</div>