build(deps): bump next from 14.2.16 to 14.2.21

Bumps [next](https://github.com/vercel/next.js) from 14.2.16 to 14.2.21.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v14.2.16...v14.2.21)

---
updated-dependencies:
- dependency-name: next
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -79,7 +79,7 @@
     "leaflet-defaulticon-compatibility": "^0.1.2",
     "lodash": "^4.17.21",
     "luxon": "^3.5.0",
-    "next": "^14.2.16",
+    "next": "^14.2.21",
     "nodemailer": "^6.9.14",
     "postgres": "^3.4.4",
     "posthog-js": "^1.131.3",