update database rules for leaderboard

Author: Hagellach37

firebase/database.rules.json

@@ -112,7 +112,8 @@
       "$uid": {
         ".read": "auth != null && auth.uid == $uid",
         ".write": "auth != null && auth.uid == $uid"
-      }
+      },
+      ".read": true
     }
   }
 }