#228-modify README.md

Fixed one erroneous URL.

Author: schmouk

README.md

@@ -1,5 +1,5 @@
 # Library cpp-strings
- [![license](http://img.shields.io/github/license/schmouk/pythonic-cpp-strings.svg?style=plastic&labelColor=blueviolet&color=lightblue)](https://github.com/schmouk/pythonic-cpp-strings/license)  [![Latest release](http://img.shields.io/github/release/schmouk/pythonic-cpp-strings.svg?style=plastic&labelColor=blueviolet&color=success)](https://github.com/schmouk/cpprandlib/releases)  [![code_coverage](https://img.shields.io/badge/code_coverage-100%25-success?style=plastic&labelColor=blueviolet)]()  [![tests](https://img.shields.io/badge/tests-passing-success?style=plastic&labelColor=blueviolet)]()
+ [![license](http://img.shields.io/github/license/schmouk/pythonic-cpp-strings.svg?style=plastic&labelColor=blueviolet&color=lightblue)](https://github.com/schmouk/pythonic-cpp-strings/license)  [![Latest release](http://img.shields.io/github/release/schmouk/pythonic-cpp-strings.svg?style=plastic&labelColor=blueviolet&color=success)](https://github.com/schmouk/pythonic-cpp-strings/releases)  [![code_coverage](https://img.shields.io/badge/code_coverage-100%25-success?style=plastic&labelColor=blueviolet)]()  [![tests](https://img.shields.io/badge/tests-passing-success?style=plastic&labelColor=blueviolet)]()
 
 ### What if c++ strings where as easy to use as Python strings?