Updated tf.add naming in TF documentation

[sushreebarsa]

Updated the naming from 'tf.add' to 'tf.math.add' in the documentation.

[github-actions]

Preview

Preview and run these notebook edits with Google Colab:

• site/en/tutorials/customization/basics.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 patch-19

[8bitmp3]

Thanks, LGTM!

fyi if you use the full namespace like tf.math.add, tf.matmul, and tf.linalg.inv, then the doc links should get autogenerated.