Update the sponsor name

Author: gaearon

PATRONS.md

@@ -4,7 +4,7 @@ The work on Redux was [funded by the community](https://www.patreon.com/reactdx)
 Meet some of the outstanding companies and individuals that made it possible:
 
 * [Webflow](https://github.com/webflow)
-* [Chess iX](http://www.chess-ix.com/)
+* [Ximedes](https://www.ximedes.com/)
 * [Herman J. Radtke III](http://hermanradtke.com)
 * [Ken Wheeler](http://kenwheeler.github.io/)
 * [Chung Yen Li](https://www.facebook.com/prototocal.lee)