Update time_series.ipynb

[RenuPatelGoogle]

Changed 'tf.keras.preprocessing.timeseries_dataset_from_array' to 'tf.keras.utils.timeseries_dataset_from_array' in '4. Create tf.data.Datasets' section.

[github-actions]

Preview

Preview and run these notebook edits with Google Colab:

• site/en/tutorials/structured_data/time_series.ipynb

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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

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