chore(deps): bump next from 9.5.5 to 11.1.1 in /app

Bumps [next](https://github.com/vercel/next.js) from 9.5.5 to 11.1.1.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v9.5.5...v11.1.1)

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

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

Author: dependabot[bot]

app/package.json

@@ -18,7 +18,7 @@
     "firebase-admin": "8.13.0",
     "firebase-functions": "3.16.0",
     "immer": "8.0.4",
-    "next": "9.5.5",
+    "next": "11.1.1",
     "react": "17.0.2",
     "react-dom": "17.0.2",
     "react-semantic-toasts": "0.6.5",