Fixed broken youtube link in README.md

Mentioned in #130

Author: sohamroy19

Diff for: README.md

@@ -9,6 +9,6 @@ For more information please see the [Preface](01-Preface.md).
 This online resource is part of Jason Turner's collection of C++ Best Practices resources.
 
 * [C++ Best Practices Book](https://leanpub.com/cppbestpractices)
-* [C++ Weekly YouTube Channel](https://www.youtube.com/c/JasonTurner-lefticus)
+* [C++ Weekly YouTube Channel](https://www.youtube.com/user/lefticus1)
 * [The Ultimate CMake/C++ Starter Project](https://github.com/lefticus/cpp_starter_project/)
 * [Learning C++ Best Practices - O'Reilly Video](http://shop.oreilly.com/product/0636920049814.do)