msgtwscr: fix formatting of metadata tags

Author: thyttan

apps/msgtwscr/metadata.json

@@ -3,7 +3,7 @@
   "version":"0.01",
   "description": "Temporarily activate scroll on twist function when a new message triggers the message app.",
   "icon": "app.png",
-  "tags": "messages,tweak, scroll",
+  "tags": "messages,tweak,scroll",
   "type": "bootloader",
   "supports" : ["BANGLEJS2"],
   "readme": "README.md",