fix(deps): bump next from 15.1.6 to 15.2.3 in /web

Bumps [next](https://github.com/vercel/next.js) from 15.1.6 to 15.2.3.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v15.1.6...v15.2.3)

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

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

Author: dependabot[bot]

web/package.json

@@ -16,7 +16,7 @@
     "@primer/primitives": "^9.1.2",
     "@primer/react": "^37.14.0",
     "axios": "^1.8.2",
-    "next": "15.1.6",
+    "next": "15.2.3",
     "prettier": "^3.5.3",
     "pusher-js": "^8.4.0",
     "react": "19.0.0",