Update README.md

README.md

@@ -15,7 +15,7 @@ tags:
 - Car
 - Wildlife
 - Architecture
-thumbnail: https://res.cloudinary.com/dcrovdixu/image/upload/t_Thumbnail/v1708291647/image-grid.png_7_xnxkav.png
+thumbnail: https://imagedelivery.net/siANnpeNAc_S2q1M3-eDrA/c200a026-c151-49c7-afbc-241fe943b300/padthumb
 base_model: stabilityai/stable-diffusion-xl-base-1.0
 ---