Bump next from 12.1.5 to 15.5.14 in /packages/web

Bumps [next](https://github.com/vercel/next.js) from 12.1.5 to 15.5.14.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v12.1.5...v15.5.14)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.14
  dependency-type: direct:production
...

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

Author: dependabot[bot]

packages/web/package.json

@@ -44,7 +44,7 @@
     "less-vars-to-js": "1.3.0",
     "lorem-ipsum": "2.0.8",
     "lottie-react": "2.4.1",
-    "next": "12.1.5",
+    "next": "15.5.14",
     "next-i18next": "15.4.1",
     "next-offline": "5.0.5",
     "next-plugin-antd-less": "1.8.0",