Bump next from 14.2.15 to 14.2.21 in /andromeda-ui

Bumps [next](https://github.com/vercel/next.js) from 14.2.15 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@v14.2.15...v14.2.21)

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

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

Author: dependabot[bot]

andromeda-ui/package-lock.json

@@ -17,7 +17,7 @@
     "eslint": "8.38.0",
     "eslint-config-next": "14.1.1",
     "konva": "^9.0.1",
-    "next": "14.2.15",
+    "next": "14.2.21",
     "papaparse": "^5.4.1",
     "postcss": "8.4.31",
     "react": "18.2.0",