Fix indentation of .travis.yml example

Wrong indentation causing error in variable definition - see
https://github.com/matthew-brett/manylinux-builds/pull/10#issuecomment-233305951

[skip ci]

README.rst

@@ -157,9 +157,9 @@ To use these scripts
             - WHEELHOUSE_UPLOADER_USERNAME=travis-worker
             # Following generated with
             # travis encrypt -r your-org/your-project-wheels WHEELHOUSE_UPLOADER_SECRET=<the api key>
-        # This is for Rackspace uploads.  Contact the scikit-learn team for
-        # permission (and the API key) to upload to the Rackspace account used
-        # here, or use your own account.
+            # This is for Rackspace uploads.  Contact Matthew Brett, or the
+            # scikit-learn team, for # permission (and the API key) to upload to
+            # the Rackspace account used here, or use your own account.
             - secure:
                 "MNKyBWOzu7JAUmC0Y+JhPKfytXxY/ADRmUIMEWZV977FLZPgYctqd+lqel2QIFgdHDO1CIdTSymOOFZckM9ICUXg9Ta+8oBjSvAVWO1ahDcToRM2DLq66fKg+NKimd2OfK7x597h/QmUSl4k8XyvyyXgl5jOiLg/EJxNE2r83IA="