Fix typo in 'Table of Contents' header

Author: robstoll

README.md

@@ -20,7 +20,7 @@ This repository contains files we are (re-)using in our OSS work published on gi
 Feel free to use them as well, they are licensed under [Creative Commons Zero v1.0 Universal](https://creativecommons.org/publicdomain/zero/1.0/).  
 You might also be interested in our [oss-template](https://github.com/tegonal/oss-template) which uses them as well next to other files such as our bash [scripts](https://github.com/tegonal/scripts).
 
-**Table of Content**
+**Table of Contents**
 - [How to use it](#how-to-use-it)
 - [Contributors and contribute](#contributors-and-contribute)
 - [License](#license)