Support PNG images

For example, https://huggingface.co/hakurei/waifu-diffusion has a nice png
If it's on purpose, you can close the PR :)

index.html

@@ -18,7 +18,7 @@
           this.models = data.models.map((model) => ({
             id: model.id,
             likes: model.likes,
-            images: model.images.filter((image) => image && image.endsWith(".jpg")),
+            images: model.images.filter((image) => image && (image.endsWith(".jpg") || image.endsWith(".png"))),
           }));
 
           this.totalPages = data.totalPages;