baikal-server.com does not work anymore

Author: /\/\ \-/ ❭❬

docs/tutorials/baikal.rst

@@ -7,4 +7,4 @@ Vdirsyncer is continuously tested against the latest version of Baikal_.
 - Baikal up to ``0.2.7`` also uses an old version of SabreDAV, with the same
   issue as ownCloud, see :gh:`160`. This issue is fixed in later versions.
 
-.. _Baikal: http://baikal-server.com/
+.. _Baikal: http://sabre.io/baikal/