fix url

Author: xbarin02

README.md

@@ -1,7 +1,7 @@
 x – minimalist data compressor
 ====================================
 
-[![Build Status](https://travis-ci.org/xbarin02/x-compressor.svg?branch=master)](https://travis-ci.com/xbarin02/x-compressor)
+[![Build Status](https://travis-ci.org/xbarin02/x-compressor.svg?branch=master)](https://travis-ci.org/xbarin02/x-compressor)
 
 Why?
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