Getting Started with Gemini: Fix "generation configuration" step

[Weiyuan-Lane]

Description of the change

While running this lab for a "Build with AI" event, noticed some issues with running the lab.
Proposing a change to allow for future participants to not face the same issue.

Motivation

Adding screenshots to show the fix better:

Current iteration:

After making the changes:

Type of change

Choose one: Bug fix

Checklist

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

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[markmcd]

This is a helpful suggestion - though I'd rather we didn't need to do this at all (and ideally we don't need to include bug workarounds in our quickstarts).

I'll talk to the team and see if we can fix this in a better way. If not we can apply your fix.