Add types to consts

src/Service/Geocoder.php

@@ -10,7 +10,7 @@ use Symfony\Contracts\HttpClient\ResponseInterface;
 
 class Geocoder
 {
-    private const API_URL = "https://nominatim.openstreetmap.org/search";
+    private const string API_URL = "https://nominatim.openstreetmap.org/search";
 
     public function __construct(private HttpClientInterface $client) {}