fix showbattery

Author: ThomasFarstrike

app_index.json

@@ -218,8 +218,8 @@
 "publisher": "MicroPythonOS",
 "short_description": "Minimal app",
 "long_description": "Demonstrates the simplest app.",
-"icon_url": "https://apps.micropythonos.com/apps/com.micropythonos.helloworld/icons/com.micropythonos.showbattery_0.1.1_64x64.png",
-"download_url": "https://apps.micropythonos.com/apps/com.micropythonos.helloworld/mpks/com.micropythonos.showbattery_0.1.1.mpk",
+"icon_url": "https://apps.micropythonos.com/apps/com.micropythonos.showbattery/icons/com.micropythonos.showbattery_0.1.1_64x64.png",
+"download_url": "https://apps.micropythonos.com/apps/com.micropythonos.showbattery/mpks/com.micropythonos.showbattery_0.1.1.mpk",
 "fullname": "com.micropythonos.showbattery",
 "version": "0.1.1",
 "category": "development",