Update README.md

README.md

@@ -39,6 +39,7 @@ The **ImageNet-Hard** contains challenging images sourced from the validation da
 
 ## Supported Tasks
 
+- `image-classification`: The objective of this task is to classify an image into one or more classes, selected from 1000 ImageNet categories (allowing for multiple ground-truth labels per image).
 
 ## Languages
 The `english_label` field in the dataset are in English.