Add presentation link to README.md (#16)

* Add link to OIDC Server presentation in README.md

README.md

@@ -23,6 +23,8 @@
 [![Share](https://img.shields.io/badge/share-FF4500?logo=reddit&logoColor=white)](https://www.reddit.com/submit?title=Check%20out%20this%20project%20on%20GitHub:%20https://github.com/Abblix/Oidc.Server)
 [![Share](https://img.shields.io/badge/share-0088CC?logo=telegram&logoColor=white)](https://t.me/share/url?url=https://github.com/Abblix/Oidc.Server&text=Check%20out%20this%20project%20on%20GitHub)
 
+🔥 Why OIDC Server is the best choice for authentication — find out in our [presentation](https://resources.abblix.com/pdf/abblix-oidc-server-presentation-eng.pdf) 📑
+
 ## Table of Contents
 - [About](#-about)
 - [Certification](#-certification)