iOS: Enable Storyboard launch screen by default

LaunchImages are deprecated, and Storyboard is supported on all currently
supported iOS versions, so this should be the default.

LaunchImages support was removed in 4.3 with #86312.

(cherry picked from commit 91c5d1e24592ee2c79360bb295448eab2d4dfbfc)

platform/ios/export/export_plugin.cpp

@@ -227,7 +227,7 @@ void EditorExportPlatformIOS::get_export_options(List<ExportOption> *r_options)
 			r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, icon_infos[i].preset_key, PROPERTY_HINT_FILE, "*.png,*.jpg,*.jpeg"), ""));
 		}
 	}
-	r_options->push_back(ExportOption(PropertyInfo(Variant::BOOL, "storyboard/use_launch_screen_storyboard"), false, true));
+	r_options->push_back(ExportOption(PropertyInfo(Variant::BOOL, "storyboard/use_launch_screen_storyboard"), true, true));
 	r_options->push_back(ExportOption(PropertyInfo(Variant::INT, "storyboard/image_scale_mode", PROPERTY_HINT_ENUM, "Same as Logo,Center,Scale to Fit,Scale to Fill,Scale"), 0));
 	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "storyboard/custom_image@2x", PROPERTY_HINT_FILE, "*.png,*.jpg,*.jpeg"), ""));
 	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "storyboard/custom_image@3x", PROPERTY_HINT_FILE, "*.png,*.jpg,*.jpeg"), ""));