Fix default guidance scale (#3)

- Fix default guidance scale (39232b27809fdf7e8152ac7e3900d52c3547c529)

README.md

@@ -110,7 +110,7 @@ image = pipe(
     width=width,
     height=height,
     num_inference_steps=50,
-    guidance_scale=8.0,
+    guidance_scale=4.0,
     generator=torch.Generator(device="cuda").manual_seed(42),
 ).images[0]