fix: Correct typo in classification_with_keras_cv.py

[chanway-speedoc]

No description provided.

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[fchollet]

Thanks for the PR -- please also apply the fix to the md and ipynb files

[chanway-speedoc]

Thanks for the PR -- please also apply the fix to the md and ipynb files

Updated as per requested. I am wondering whether there is a more automated manner to update all 3 files at once.