text: Title: fix: Densenet Documentation
  Body: This is code for DenseNet121 in Keras 
  ```
  keras.applications.DenseNet121(
      include_top=True,
      weights="imagenet",
      input_tensor=None,
      input_shape=None,
      pooling=None,
      classes=1000,
      classifier_activation="softmax",
      name="densenet121",
  )
  ```
  And the documentation for the keras is not much specify about the `classes` argument 
  
  Earlier Documentation : classes: optional number of classes to classify images into, only to be specified if include_top is True, and if no weights argument is specified.
  
  Updated Documentation : classes: optional number of classes to classify images into, only to be specified if include_top is True, and if no weights argument is specified. **Defaults to 1000**