update in Kitematic OS support

Kitematic now support Windows

Signed-off-by: Marcelo Salazar R <chelosalazar@gmail.com>

README.md

@@ -289,7 +289,7 @@ system
 * [Docker Compose](https://github.com/docker/compose) (formerly Fig): 
 Define and run multi-container apps
 * [Kitematic](https://github.com/kitematic/kitematic): The easiest way to use 
-Docker on a Mac
+Docker on Mac and Windows
 
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 us keep this list up-to-date by submitting a PR.