Update python.ipynb

[bebechien]

Description of the change

"genai.configure(transport='grpc')" will lead the RpcError. I had to remove this line to make the sample works correctly.

Motivation

Sample notebook in Gemini model tuning won't work. (b/329517387)

Type of change

Bug fix

Checklist

• [x] I have performed a self-review of my code.
• [x] I have added detailed comments to my code where applicable.
• [x] I have verified that my change does not break existing code.
• [x] My PR is based on the latest changes of the main branch (if unsure, please run git pull --rebase upstream main).
• [x] I am familiar with the Google Style Guide for the language I have coded in.
• [x] I have read through the Contributing Guide and signed the Contributor License Agreement.

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[markmcd]

You'll need to register your GitHub account at http://github/ so the CLA check passes (it's also a policy requirement)

[bebechien]

You'll need to register your GitHub account at http://github/ so the CLA check passes (it's also a policy requirement)

Thanks! I just added my account.

[markmcd]

Thanks for the fix :)