Fix draw URL

Author: ThomasFarstrike

app_index.json

@@ -55,11 +55,11 @@
 "publisher": "MicroPythonOS",
 "short_description": "Simple drawing app",
 "long_description": "Draw simple shapes on the screen.",
-"icon_url": "http://demo.lnpiggy.com:2121/apps/com.micropythonos.draw_0.0.1.mpk_icon_64x64.png",
-"download_url": "http://demo.lnpiggy.com:2121/apps/com.micropythonos.draw_0.0.1.mpk",
+"icon_url": "https://apps.micropythonos.com/apps/com.micropythonos.draw/icons/com.micropythonos.draw_0.0.1.mpk_icon_64x64.png",
+"download_url": "https://apps.micropythonos.com/apps/com.micropythonos.draw/mpks/com.micropythonos.draw_0.0.1.mpk",
 "fullname": "com.micropythonos.draw",
 "version": "0.0.1",
-"category": "art",
+"category": "graphics",
 "activities": [
     {
       "entrypoint": "assets/draw.py",