chore(deps-dev): Bump next from 14.2.17 to 15.1.2

Bumps [next](https://github.com/vercel/next.js) from 14.2.17 to 15.1.2.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v14.2.17...v15.1.2)

---
updated-dependencies:
- dependency-name: next
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

packages/bootstrap/package.json

@@ -64,7 +64,7 @@
     "@types/web": "^0.0.178",
     "@vitejs/plugin-react": "^4.3.2",
     "alexjs": "^1.0.0",
-    "next": "^14",
+    "next": "^15",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "typescript": "^5.6.3",