Update dependency discord.js to v14

Author: renovate[bot]

package.json

@@ -11,7 +11,7 @@
     "canvas": "2.11.0",
     "canvas-constructor": "5.0.2",
     "cookie-parser": "1.4.6",
-    "discord.js": "13.13.1",
+    "discord.js": "14.8.0",
     "express": "4.18.2",
     "express-session": "1.17.3",
     "fs-nextra": "0.5.1",