generative_ai.test_gemini_examples: test_gemini_chat_example failed

[flaky-bot[bot]]

Note: #11027 was also for this test, but it was closed more than 10 days ago. So, I didn't mark it flaky.

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commit: 555b9d630d21c08c2e9cb94b1a53780f602290f0 buildURL: Build Status, Sponge status: failed