Bump discord.js from 14.9.0 to 14.21.0

---
updated-dependencies:
- dependency-name: discord.js
  dependency-version: 14.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -25,7 +25,7 @@
   },
   "dependencies": {
     "date-fns": "^4.1.0",
-    "discord.js": "^14.8.0",
+    "discord.js": "^14.21.0",
     "lodash": "^4.17.21",
     "mixpanel": "^0.18.1",
     "pg": "^8.14.1",