hermano: add platform

Author: avivace

entries/patmorita__hermano-game-boy/game.json

@@ -1,4 +1,5 @@
 {
+    "platform": "GB",
     "screenshots": [
         "fAkFkL.png",
         "xdhLjE.png",
@@ -25,4 +26,4 @@
     "website": "https://patmorita.itch.io/hermano-game-boy",
     "slug": "patmorita__hermano-game-boy",
     "repository": "https://github.com/greenwebsevilla/Hermano"
-}
+}