Updates zone file path

Updates the default zone file path to point to the parking zones file.

This change ensures the application uses the correct GeoJSON file for determining parking zones.

Source/ProofOfConcept/Services/ZoneDeterminatorService.cs

@@ -67,5 +67,5 @@ public class ZoneDeterminatorService
 
 public class ZoneDeterminatorServiceConfiguration
 {
-    public string ZoneFilePath { get; set; } = "Resources/zones.geojson";
+    public string ZoneFilePath { get; set; } = "Resources/parking_zones.geojson";
 }