Update README.md

Author: princemaple

README.md

@@ -67,7 +67,7 @@ But knowing the stuff will help you become better! :muscle:*
 
 ### RegExp
 - [RegexHQ](https://github.com/regexhq)
-- [Learn regex the easy way](https://github.com/zeeshanu/learn-regex.git)
+- [Learn regex the easy way](https://github.com/zeeshanu/learn-regex)
 
 ### Security
 - :book: [Security Programming](https://www.dwheeler.com/secure-programs/)