Fix icon URLs

Author: ThomasFarstrike

app_index.json

@@ -80,7 +80,7 @@
 "publisher": "LightningPiggy Foundation",
 "short_description": "Display wallet that shows balance, transactions, receive QR code etc.",
 "long_description": "See https://www.LightningPiggy.com",
-"icon_url": "https://apps.micropythonos.com/icons/com.lightningpiggy.displaywallet_0.0.1.mpk_icon_64x64.png",
+"icon_url": "https://apps.micropythonos.com/icons/com.lightningpiggy.displaywallet_0.0.1_64x64.png",
 "download_url": "https://apps.micropythonos.com/mpks/com.lightningpiggy.displaywallet_0.0.1.mpk",
 "fullname": "com.lightningpiggy.displaywallet",
 "version": "0.0.1",
@@ -103,7 +103,7 @@
 "publisher": "MicroPythonOS",
 "short_description": "Camera with QR decoding",
 "long_description": "Camera for both internal camera's and webcams, that includes QR decoding.",
-"icon_url": "https://apps.micropythonos.com/com.micropython.camera_0.0.3.mpk_icon_64x64.png",
+"icon_url": "https://apps.micropythonos.com/com.micropython.camera_0.0.3_64x64.png",
 "download_url": "https://apps.micropythonos.com/com.micropython.camera_0.0.3.mpk",
 "fullname": "com.micropython.camera",
 "version": "0.0.3",
@@ -131,7 +131,7 @@
 "publisher": "MicroPythonOS",
 "short_description": "Store for App(lication)s",
 "long_description": "",
-"icon_url": "https://apps.micropythonos.com/icons/com.micropythonos.appstore_0.0.3.mpk_icon_64x64.png",
+"icon_url": "https://apps.micropythonos.com/icons/com.micropythonos.appstore_0.0.3_64x64.png",
 "download_url": "https://apps.micropythonos.com/mpks/com.micropythonos.appstore_0.0.3.mpk",
 "fullname": "com.micropythonos.appstore",
 "version": "0.0.3",
@@ -155,7 +155,7 @@
 "publisher": "MicroPythonOS",
 "short_description": "Simple launcher to start apps.",
 "long_description": "",
-"icon_url": "https://apps.micropythonos.com/icons/com.micropythonos.launcher_0.0.3.mpk_icon_64x64.png",
+"icon_url": "https://apps.micropythonos.com/icons/com.micropythonos.launcher_0.0.3_64x64.png",
 "download_url": "https://apps.micropythonos.com/mpks/com.micropythonos.launcher_0.0.3.mpk",
 "fullname": "com.micropythonos.launcher",
 "version": "0.0.3",