README.md: fix travis location

Signed-off-by: Giuseppe Scrivano <giuseppe@scrivano.org>

README.md

@@ -1,6 +1,6 @@
 # crun
 
-[![Build Status](https://travis-ci.org/giuseppe/crun.svg?branch=master)](https://travis-ci.org/giuseppe/crun)
+[![Build Status](https://travis-ci.org/containers/crun.svg?branch=master)](https://travis-ci.org/containers/crun)
 [![Coverity Status](https://scan.coverity.com/projects/17787/badge.svg)](https://scan.coverity.com/projects/giuseppe-crun)
 [![Total alerts](https://img.shields.io/lgtm/alerts/g/giuseppe/crun.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/giuseppe/crun/alerts/)
 [![Language grade: C/C++](https://img.shields.io/lgtm/grade/cpp/g/giuseppe/crun.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/giuseppe/crun/context:cpp)