fix: vienna date

Author: geromegrignon

angular-hub/src/public/assets/data/community.json

@@ -1064,7 +1064,7 @@
         "name": "NgGlühwein 2024",
         "type": "meetup",
         "location": "Vienna, Austria",
-        "date": "2024-08-07",
+        "date": "2024-12-14",
         "language": "English",
         "isFree": true,
         "isRemote": false,