Fix contribute.json location as per spec

Signed-off-by: Jason Robinson <jasonr@matrix.org>

package.json

@@ -24,7 +24,8 @@
     "LICENSE",
     "README.md",
     "AUTHORS.rst",
-    "package.json"
+    "package.json",
+    "contribute.json"
   ],
   "style": "bundle.css",
   "scripts": {

scripts/copy-res.js

@@ -66,7 +66,7 @@ const COPY_LIST = [
     ["node_modules/matrix-react-sdk/res/media/**", "webapp/media"],
     ["node_modules/olm/olm_legacy.js", "webapp", { directwatch: 1 }],
     ["./config.json", "webapp", { directwatch: 1 }],
-    ["res/contribute.json", "webapp"],
+    ["contribute.json", "webapp"],
 ];
 
 const parseArgs = require('minimist');