Bump react-router from 7.9.1 to 7.9.4 in /horreum-web

Bumps [react-router](https://github.com/remix-run/react-router/tree/HEAD/packages/react-router) from 7.9.1 to 7.9.4.
- [Release notes](https://github.com/remix-run/react-router/releases)
- [Changelog](https://github.com/remix-run/react-router/blob/main/packages/react-router/CHANGELOG.md)
- [Commits](https://github.com/remix-run/react-router/commits/react-router@7.9.4/packages/react-router)

---
updated-dependencies:
- dependency-name: react-router
  dependency-version: 7.9.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

horreum-web/package-lock.json

@@ -31,7 +31,7 @@
   "react-dom": "19.2.0",
   "react-markdown": "10.1.0",
   "react-redux": "9.2.0",
-  "react-router": "7.9.1",
+  "react-router": "7.9.4",
   "react-router-dom": "7.9.1",
   "react-to-print": "3.1.1",
   "recharts": "3.1.2",