Bump @types/geojson from 7946.0.10 to 7946.0.14 in /backend

Bumps [@types/geojson](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/geojson) from 7946.0.10 to 7946.0.14.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/geojson)

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

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

Author: dependabot[bot]

backend/package-lock.json

@@ -25,7 +25,7 @@
     "@types/eslint": "^8.44.6",
     "@types/eslint-plugin-prettier": "^3.1.0",
     "@types/express": "^4.17.21",
-    "@types/geojson": "^7946.0.10",
+    "@types/geojson": "^7946.0.14",
     "@types/http-errors": "^2.0.1",
     "@types/jsonstream": "^0.8.33",
     "@types/jsonwebtoken": "^9.0.4",