Bump leaflet from 1.9.3 to 1.9.4

Bumps [leaflet](https://github.com/Leaflet/Leaflet) from 1.9.3 to 1.9.4.
- [Release notes](https://github.com/Leaflet/Leaflet/releases)
- [Changelog](https://github.com/Leaflet/Leaflet/blob/main/CHANGELOG.md)
- [Commits](Leaflet/Leaflet@v1.9.3...v1.9.4)

---
updated-dependencies:
- dependency-name: leaflet
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -24,7 +24,7 @@
         "eslint-plugin-react": "^7.32.2",
         "file-loader": "^6.2.0",
         "highlight.js": "^11.8.0",
-        "leaflet": "^1.9.3",
+        "leaflet": "^1.9.4",
         "postcss": "^8.4.26",
         "postcss-loader": "^7.3.3",
         "prop-types": "^15.8.1",