chore(deps): bump next from 13.4.16 to 13.4.19 in /app

Bumps [next](https://github.com/vercel/next.js) from 13.4.16 to 13.4.19.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v13.4.16...v13.4.19)

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

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

app/package.json

@@ -45,7 +45,7 @@
     "i18next": "^23.4.2",
     "i18next-browser-languagedetector": "^7.1.0",
     "i18next-resources-to-backend": "^1.1.4",
-    "next": "13.4.16",
+    "next": "13.4.19",
     "next-auth": "^4.23.1",
     "pg": "^8.11.2",
     "pg-hstore": "^2.3.4",