Point logo to master

Author: Alejandro de Haro

README.md

@@ -1,6 +1,6 @@
 # [C++ .ENV](https://github.com/adeharo9/cpp-dotenv)
 
-<img src="https://raw.githubusercontent.com/adeharo9/cpp-dotenv/dev/cpp-dotenv.png" alt="cpp-dotenv" align="right"/>
+<img src="https://raw.githubusercontent.com/adeharo9/cpp-dotenv/master/cpp-dotenv.png" alt="cpp-dotenv" align="right"/>
 
 ![v1.0.0-alpha](https://img.shields.io/badge/version-v1.0.0--alpha-blue "v1.0.0-alpha")
 ![BSD 3-clause license](https://img.shields.io/badge/license-BSD%203--clause-green "BSD 3-clause license")