Update example skia_svg_render

examples/skia_svg_render.cc

@@ -20,7 +20,7 @@ int main(int argc, char *argv[]) {
     const int pixelBytes = 4;
 
     if (argc < 3) {
-        std::cout << "skia_svg_render input_svg_path output_png_path\n";
+        std::cout << "Usage: skia_svg_render input_svg_path output_png_path\n";
         return 1;
     }