Fix Travis link (#1059)

README.md

@@ -1,4 +1,4 @@
-# Public APIs [![Build Status](https://api.travis-ci.org/toddmotto/public-apis.svg)](https://travis-ci.org/toddmotto/public-apis)
+# Public APIs [![Build Status](https://api.travis-ci.org/public-apis/public-apis.svg)](https://travis-ci.org/public-apis/public-apis)
 
 A collective list of free APIs for use in software and web development.