update links

index.html

@@ -51,7 +51,7 @@
     ['h', { name: 'Hypem', url: 'https://hypem.com/popular' }],
     ['i', { name: 'Discord', url: 'https://discord.com/channels/@me' }],
     ['k', { name: 'Keep', url: 'https://keep.google.com' }],
-    ['l', { name: 'LinkedIn', url: 'https://www.linkedin.com/feed/' }],
+    ['l', { name: 'LeetCode', url: 'https://leetcode.com/problemset/all/' }],
     ['m', { name: 'Mail', url: 'https://mail.proton.me/u/0/inbox' }],
     ['n', { name: 'Notion', url: 'https://www.notion.so' }],
     [
@@ -74,7 +74,7 @@
         url: 'https://en.wikipedia.org',
       },
     ],
-    ['x', { name: 'X', url: 'https://x.com' }],
+    ['x', { name: '𝕏', url: 'https://x.com' }],
     [
       'y',
       {