Update site data

Author: neetcode-gh

.problemList.json

@@ -585,6 +585,16 @@
           "https://leetcode.com/problems/copy-list-with-random-pointer/",
           "0138"
        ],
+       [
+         "Design Linked List",
+         "https://leetcode.com/problems/design-linked-list/",
+         "0707"
+      ],
+      [
+         "Design Browser History",
+         "https://leetcode.com/problems/design-browser-history/",
+         "1472"
+      ],
        [
           "Add Two Numbers",
           "https://leetcode.com/problems/add-two-numbers/",