Update metadata and markdown after harvest

Author: MishkatIT

submissions/.harwest_timestamps.json

@@ -5,8 +5,8 @@
     "timestamp": 1771089931
   },
   "Codeforces": {
-    "formatted_time": "2026-04-17 00:08:22",
-    "new_submissions_count": 6,
-    "timestamp": 1776362902
+    "formatted_time": "2026-04-21 23:58:59",
+    "new_submissions_count": 3,
+    "timestamp": 1776794339
   }
 }