changed platform "browser" to "web"

games/arashi-js.md

@@ -5,7 +5,7 @@ _Remake of Tempest._
 - Home: https://stephank.github.io/arashi-js/
 - State: beta, inactive since 2010
 - Play: http://stephank.github.com/arashi-js/
-- Platform: browser
+- Platform: Web
 - Keywords: remake, inspired by Tempest, shooter
 - Code repository: https://github.com/stephank/arashi-js.git
 - Code language: JavaScript