Fixing internal links

Author: DrkSephy

README.md

@@ -4,18 +4,18 @@ A cheatsheet containing ES6 tips, tricks, best practices and code snippet exampl
 
 ## Table of Contents
 
-- [var versus let / const](#var-versus-let-/-const)
-- [Replacing IIFEs with Blocks](#Replacing-IIFEs-with-Blocks)
-- [Arrow Functions](#Arrow-Functions)
-- [Strings](#Strings)
-- [Destructuring](#Destructuring)
-- [Modules](#Modules)
-- [Parameters](#Parameters)
-- [Classes](#Classes)
-- [Symbols](#Symbols)
-- [Maps](#Maps)
-- [WeakMaps](#WeakMaps)
-- [Promises](#Promises)
+- [var versus let / const](#var-versus-let--const)
+- [Replacing IIFEs with Blocks](#replacing-iifes-with-blocks)
+- [Arrow Functions](#arrow-functions)
+- [Strings](#strings)
+- [Destructuring](#destructuring)
+- [Modules](#modules)
+- [Parameters](#parameters)
+- [Classes](#classes)
+- [Symbols](#symbols)
+- [Maps](#maps)
+- [WeakMaps](#weakmaps)
+- [Promises](#promises)
 
 ## var versus let / const