[Map][Leaflet] Rename leaflet to L in event's payloads

Author: Kocal

src/Map/src/Bridge/Leaflet/assets/src/map_controller.ts

@@ -33,7 +33,7 @@ export default class extends AbstractMapController<
             prefix: 'ux:map',
             detail: {
                 ...payload,
-                leaflet: L,
+                L,
             },
         });
     }