Chore(deps): bump next from 15.1.7 to 15.2.0 in /e2e/test-app

Bumps [next](https://github.com/vercel/next.js) from 15.1.7 to 15.2.0.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.1.7...v15.2.0)

---
updated-dependencies:
- dependency-name: next
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

e2e/test-app/package-lock.json

@@ -18,7 +18,7 @@
     "@inrupt/solid-client-authn-browser": "^2.3.0",
     "@inrupt/solid-client-authn-node": "^2.3.0",
     "@inrupt/solid-client-vc": "^1.2.0",
-    "next": "^15.1.7",
+    "next": "^15.2.1",
     "react": "^19.0.0"
   },
   "devDependencies": {