Update altstore.template.json

Author: RandomModderJDK

web/altstore.template.json

@@ -13,7 +13,6 @@
       "githubRepository": "HWM",
       "skipPrerelease": true,
       "beta": false,
-      "filename": null,
       "developerName": "RandomModder",
       "subtitle": "Manage homeworks. Nicely.",
       "localizedDescription": "A homework manager utilizing untis for fetching the subjects of the week and discord as a cloud solution.",