Update challenge progress dashboard

Author: Mingguriguri

_MonthlyChallenges/DASHBOARD.md

@@ -6,3 +6,5 @@
 | Mingguriguri | DP | 5 | ✅ |
 | zaqquum | 그래프 | 0 | ❌ |
 | zaqquum | DP | 2 | ❌ |
+| learntosurf | 그래프 | 0 | ❌ |
+| learntosurf | DP | 3 | ❌ |

_MonthlyChallenges/scoreboard.json

@@ -25,6 +25,18 @@
         "그래프": false,
         "DP": false
       }
+    },
+    "learntosurf": {
+      "그래프": [],
+      "DP": [
+        14430,
+        2342,
+        2293
+      ],
+      "achieved": {
+        "그래프": false,
+        "DP": false
+      }
     }
   }
 }