Resolve Libraries Conflict in chapter3/section3_tf.ipynb

[heispv]

As documented in Issue #19262 on the Keras GitHub repository, there was a conflict between the Transformers and Keras libraries. Specifically, executing the following code resulted in an error associated with the Adam optimizer:

import tensorflow as tf

model = TFAutoModelForSequenceClassification.from_pretrained('checkpoint', num_labels=2)
loss = tf.keras.losses.SparseCategoricalCrossentropy(from_logits=True)
model.compile(optimizer='opt', loss=loss, metrics=["accuracy"])

I have updated the notebook to resolve this issue. With the modifications applied, the error no longer occurs, ensuring compatibility between the two libraries.

[review-notebook-app]

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