Fix: Correct resource key for export-success message

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/MainWindow.java

@@ -797,7 +797,7 @@ public class MainWindow extends Application {
             if (render instanceof FeatureNode node) {
                 try {
                     controller.export(node.getFeature());
-                    logger.info(Localization.getText("CityDoctorController.export"));
+                    logger.info(Localization.getText("CityDoctorController.exportSuccess"));
                 } catch (Exception e) {
                     logger.error("Export failed: Unexpected error occurred");
                     logger.error(e);