Update regression.ipynb

[rmothukuru]

Fixes 24342

Added the Note, as suggested by Mark in this Github Comment.

[github-actions]

Preview

Preview and run these notebook edits with Google Colab:

• site/en/tutorials/keras/regression.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-1

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[8bitmp3]

Fixed the notebook:

-         "...feature normalization, normalization makes training much more stable. "
+         "...feature normalization, normalization makes training much more stable.\n",

(This can happen when adding new lines in the same notebook cell while working with a raw JSON file).

LGTM.