ci: improve app script

scripts/nextcloud-apps.py

+#!/usr/bin/python3
+
 import argparse,requests,json,tarfile,os
 
 def get_manifest(path):
@@ -15,8 +17,8 @@ def update_nc(manifest, major=""):
     response = requests.get('https://api.github.com/repos/nextcloud/server/releases')
     body = response.json()
     for version in body:
-        if (not version["draft"] and not version["prerelease"] and version["name"].startswith("v"+major)):
-            manifest["version"] = version["name"][1:]
+        if (not version["draft"] and not version["prerelease"] and version["tag_name"].startswith("v"+major)):
+            manifest["version"] = version["tag_name"][1:]
             break
 
 def update_apps(manifest):