Bump react-router from 7.5.2 to 7.12.0 (#243)

Bumps [react-router](https://github.com/remix-run/react-router/tree/HEAD/packages/react-router) from 7.5.2 to 7.12.0.
- [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@7.12.0/packages/react-router)

---
updated-dependencies:
- dependency-name: react-router
  dependency-version: 7.12.0
  dependency-type: direct:production
...

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package.json

@@ -30,7 +30,7 @@
     "react-dom": "^18.3.1",
     "react-intl": "^6.8.9",
     "react-linkify": "^1.0.0-alpha",
-    "react-router": "^7.5.2",
+    "react-router": "^7.12.0",
     "rehype-stringify": "^10.0.1",
     "remark-parse": "^11.0.0",
     "remark-rehype": "^11.1.1",