Update Overflowing Mastery links

Author: Tibowl

src/data/events.json

@@ -2805,7 +2805,8 @@
     {
         "name": "\"Overflowing Mastery\" Event",
         "type": "In-game",
-        "img": "https://upload-os-bbs.hoyolab.com/upload/2023/01/17/713e290d673605bb82d2832ae54d75fd_7695223179940458996.jpg",
+        "link": "https://www.hoyolab.com/article/20642611",
+        "img": "https://upload-os-bbs.hoyolab.com/upload/2023/08/04/713e290d673605bb82d2832ae54d75fd_4700445753364011572.jpg",
         "start": "2023-08-07 04:00:00",
         "end": "2023-08-14 03:59:00",
         "reminder": "daily"