fix(ads): pass user role when creating a native ad

- Add 'userRole' parameter to the '_createNativeAd' function call
- This ensures that the user's role is considered when loading ads

Author: fulleni

lib/ads/widgets/feed_ad_loader_widget.dart

@@ -216,6 +216,7 @@ class _FeedAdLoaderWidgetState extends State<FeedAdLoaderWidget> {
         adType: widget.adPlaceholder.adType,
         adThemeStyle: widget.adThemeStyle,
         headlineImageStyle: headlineImageStyle,
+        userRole: userRole,
       );
 
       if (loadedAd != null) {