Bump react-router-dom in /Dysnomia.DownStatus.WebApp/ClientApp

Bumps [react-router-dom](https://github.com/remix-run/react-router/tree/HEAD/packages/react-router-dom) from 6.18.0 to 6.20.0.
- [Release notes](https://github.com/remix-run/react-router/releases)
- [Changelog](https://github.com/remix-run/react-router/blob/main/packages/react-router-dom/CHANGELOG.md)
- [Commits](https://github.com/remix-run/react-router/commits/react-router-dom@6.20.0/packages/react-router-dom)

---
updated-dependencies:
- dependency-name: react-router-dom
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Dysnomia.DownStatus.WebApp/ClientApp/package.json

@@ -6,7 +6,7 @@
     "http-proxy-middleware": "^2.0.6",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
-    "react-router-dom": "^6.18.0",
+    "react-router-dom": "^6.20.0",
     "workbox-background-sync": "^7.0.0",
     "workbox-broadcast-update": "^7.0.0",
     "workbox-cacheable-response": "^7.0.0",