chore(docs): update TOC

README.md

@@ -20,30 +20,9 @@ Available as a command-line utility, a library and a [GitHub Action](https://git
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
 ## Table of Contents
 
-- [Table of Contents](#table-of-contents)
 - [Installation](#installation)
-  - [Arch Linux](#arch-linux)
-  - [macOS](#macos)
-  - [Docker](#docker)
-  - [NixOS](#nixos)
-  - [FreeBSD](#freebsd)
-  - [Scoop](#scoop)
-  - [Termux](#termux)
-  - [Pre-built binaries](#pre-built-binaries)
-  - [Cargo](#cargo)
-    - [Build dependencies](#build-dependencies)
-    - [Compile and install lychee](#compile-and-install-lychee)
-    - [Feature flags](#feature-flags)
 - [Features](#features)
 - [Commandline usage](#commandline-usage)
-  - [Docker Usage](#docker-usage)
-    - [Linux/macOS shell command](#linuxmacos-shell-command)
-    - [Windows PowerShell command](#windows-powershell-command)
-  - [GitHub Token](#github-token)
-  - [Commandline Parameters](#commandline-parameters)
-  - [Exit codes](#exit-codes)
-  - [Ignoring links](#ignoring-links)
-  - [Caching](#caching)
 - [Library usage](#library-usage)
 - [GitHub Action Usage](#github-action-usage)
 - [Contributing to lychee](#contributing-to-lychee)