Update models-widgets-examples.md (#350)

Author: mishig25

docs/hub/models-widgets-examples.md

@@ -268,6 +268,15 @@ widget:
   src: "https://huggingface.co/datasets/mishig/sample_images/resolve/main/palace.jpg"
 ```
 
+### Zero-Shot Image Classification
+
+```yaml
+widget:
+- src: https://huggingface.co/datasets/mishig/sample_images/resolve/main/cat-dog-music.png
+  candidate_labels: playing music, playing sports
+  example_title: Cat & Dog
+```
+
 ## Other
 
 ### Structured Data Classification