chore(deps): update dependency @types/leaflet.markercluster to v1.5.6

Author: renovate[bot]

frontend/package-lock.json

@@ -30,7 +30,7 @@
     "@types/jsdom": "21.1.7",
     "@types/leaflet": "1.9.17",
     "@types/leaflet.fullscreen": "3.0.2",
-    "@types/leaflet.markercluster": "1.5.5",
+    "@types/leaflet.markercluster": "1.5.6",
     "@types/lodash": "4.17.16",
     "@types/node": "22.15.3",
     "@vitejs/plugin-vue": "5.2.3",