Bump @types/leaflet from 1.9.3 to 1.9.4

Bumps [@types/leaflet](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/leaflet) from 1.9.3 to 1.9.4.
- [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
...

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

package.json

@@ -62,7 +62,7 @@
     "@testing-library/react": "^14.0.0",
     "@testing-library/user-event": "^14.4.3",
     "@total-typescript/shoehorn": "^0.1.1",
-    "@types/leaflet": "^1.9.3",
+    "@types/leaflet": "^1.9.4",
     "@types/ramda": "^0.27.66",
     "@types/react": "^18.2.21",
     "@types/react-dom": "^18.2.7",