fix shapes error if images was a list.

[divyashreepathihalli]

Fixing error in this guide - classification_with_keras_cv

AttributeError                            Traceback (most recent call last)
[<ipython-input-3-79c475acdf18>](https://localhost:8080/#) in <cell line: 4>()
      2 image = keras.utils.load_img(filepath)
      3 image = np.array(image)
----> 4 keras_cv.visualization.plot_image_gallery(
      5     [image], rows=1, cols=1, value_range=(0, 255), show=True, scale=4
      6 )

[/usr/local/lib/python3.10/dist-packages/keras_cv/src/visualization/plot_image_gallery.py](https://localhost:8080/#) in plot_image_gallery(images, value_range, scale, rows, cols, path, show, transparent, dpi, legend_handles)
    130     else:
    131         batch_size = (
--> 132             images.shape[0] if len(images.shape) == 4 else 1
    133         )  # batch_size from np.array or single image
    134 

AttributeError: 'list' object has no attribute 'shape'

[sampathweb]

LGTM