Bump @types/leaflet from 1.9.8 to 1.9.9 in /ui (#392)

Bumps [@types/leaflet](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/leaflet) from 1.9.8 to 1.9.9.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/leaflet)

---
updated-dependencies:
- dependency-name: "@types/leaflet"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

ui/package.json

@@ -50,7 +50,7 @@
     "@graphql-codegen/typescript-react-query": "^6.1.0",
     "@next/bundle-analyzer": "^14.1.4",
     "@tanstack/react-query-devtools": "^5.28.8",
-    "@types/leaflet": "^1.9.8",
+    "@types/leaflet": "^1.9.9",
     "@types/node": "20.11.30",
     "@types/phoenix": "^1.6.4",
     "@types/react": "18.2.73",