Update header levels

Updated formatting and structure of prerequisites section.

Author: linawolf

Documentation/Quickstart/1-Preqrequisites.rst

@@ -6,6 +6,7 @@
 
 ..  _quickstart-prerequisites:
 
+==========================
 Quick Start: Prerequisites
 ==========================
 
@@ -16,15 +17,17 @@ the Quick Start guide, you should know how to do this.
 ..  contents::
 
 ..  _quickstart-prerequisites-operating-system:
+
 Operating System
-----------------
+================
 
 A computer running Windows with WSL2, macOS or Linux - connected to
 the Internet.
 
 ..  _quickstart-prerequisites-docker:
+
 Docker
-------
+======
 
 Either the "original" `Docker Desktop <https://www.docker.com/products/docker-desktop/>`__
 or an alternative like `OrbStack <https://orbstack.dev/>`__, `Podman <https://podman.io/>`__,
@@ -33,15 +36,17 @@ do not need to install any `Desktop` variants, but can use their base
 Docker or Podman setup.
 
 ..  _quickstart-prerequisites-ddev:
+
 DDEV
-----
+====
 
 `DDEV <https://ddev.com>`__ is a layer on top of Docker. How to utilize it is
 covered in this guide.
 
 ..  _quickstart-prerequisites-terminal:
+
 Terminal (Bash)
----------------
+===============
 
 Your operating system needs to provide a Bash terminal, many steps of this guide
 will be executed on the shell.
@@ -51,32 +56,36 @@ provided by the TYPO3 Core (most importantly `runTests.sh`) require Bash
 to be available.
 
 ..  _quickstart-prerequisites-git-client:
+
 Git client
-----------
+==========
 
 This guide expects you can execute `git` terminal commands.
 
 This guide uses the *https* method to connect to GitHub, so you do not
 need to have a GitHub account.
 
 ..  _quickstart-prerequisites-ssh:
+
 SSH client plus SSH key(s) and an email account
------------------------------------------------
+===============================================
 
 This guide expects you can execute `ssh` terminal commands and connect to
 foreign hosts. You will need a private SSH key pair and know how to authenticate
 with it. You need an email account to setup accounts.
 
 ..  _quickstart-prerequisites-ide:
+
 PHP IDE / Editor
-----------------
+================
 
 It is recommended to use a good PHP IDE. As part of the target audience of this guide
 you should already use something like PhpStorm, Visual Studio Code, vi(m)...
 
 ..  _quickstart-assumptions:
+
 Assumed path structure and name usage
--------------------------------------
+=====================================
 
 We will use: