Update table of contents

Author: ziishaned

README.md

@@ -69,6 +69,7 @@ letter and also it is too short.
   - [Case Insensitive](#51-case-insensitive)
   - [Global search](#52-global-search)
   - [Multiline](#53-multiline)
+- [Greedy vs lazy matching](#6-greedy-vs-lazy-matching)
 
 ## 1. Basic Matchers