Documentation Fix - Ragged Tensor

[balaganesh102004]

Addressing issue #65399 in tensorflow repo, The documentation for RaggedTensors in which it stated that
"Ragged tensors may be passed as inputs to a Keras model by setting ragged=True on tf.keras.Input or tf.keras.layers.InputLayer."
As there was no support for ragged tensors in the input layer as a parameter. I have altered the documentation to reflect this change and resolve the inconsistency.

[github-actions]

Preview

Preview and run these notebook edits with Google Colab:

• site/en/guide/ragged_tensor.ipynb

Rendered notebook diffs available on ReviewNB.com.

Format and style

Use the TensorFlow docs notebook tools to format for consistent source diffs and lint for style:

$ python3 -m pip install -U --user git+https://github.com/tensorflow/docs

$ python3 -m tensorflow_docs.tools.nbfmt notebook.ipynb

$ python3 -m tensorflow_docs.tools.nblint --arg=repo:tensorflow/docs notebook.ipynb

If commits are added to the pull request, synchronize your local branch: git pull origin master

[MarkDaoust]

This example still fails with these changes on TF2.16 + keras 3.2.1

[MarkDaoust]

Fixes: tensorflow/tensorflow#65399