Update scoreboard.json

Author: Mingguriguri

_MonthlyChallenges/scoreboard.json

@@ -11,6 +11,17 @@
         "그래프": false,
         "구현": false
       }
+    },
+    "Mingguriguri": {
+      "그래프": [],
+      "구현": [
+        1283,
+        2564
+      ],
+      "achieved": {
+        "그래프": false,
+        "구현": false
+      }
     }
   }
-}
+}