readme update

Author: icanzilb

README.md

@@ -7,12 +7,17 @@
 ### Table of Contents
 
 1. [Usage](#usage)
+
 1.1 [Bind a plain list of elements](https://github.com/combineopensource/CombineDataSources#bind-a-plain-list-of-elements)
+
 1.2 [Bind a list of Section models](#bind-a-list-of-section-models)
+
 1.2 [Customize the table controller](#customize-the-table-controller)
+
 1.3 [Subscribing a completing publisher](#subscribing-a-completing-publisher)
 
 2. [Installation](#installation)
+
 2.1 [Swift Package Manager](#swift-package-manager)
 
 3. [License](#license)