📝 Fix minor typos on security tutorial

docs/security/tutorial.adoc

@@ -4,18 +4,16 @@ layout: docs-adoc
 menu: security
 ---
 
-== Introduction
-
 This tutorial aims to provide a thorough understanding of securing RESTHeart applications. RESTHeart offers robust security features, with **Authentication** and **Authorization** being central to these. This guide will explore the basic authentication. We'll also delve into authorization, focusing on Access Control Lists (ACLs) and their role in defining permissions.
 
 By the end of this tutorial, you'll have a solid foundation in securing RESTHeart applications, ensuring data security and controlled access.
 
-== Prerequisites
+== What you need
 
 1. **Docker**: For running RESTHeart.
 2. **HTTPie**: A user-friendly command-line HTTP client. Download at link:https://httpie.io/cli[httpie.io/cli^].
 
-== Starting RESTHeart and MongoDB with Docker Compose
+== Starting RESTHeart and MongoDB
 
 To begin, create a directory for RESTHeart and use Docker Compose to start both RESTHeart and MongoDB: