Update README.md

[codelion]

Add note about Gemini models.

[patched-admin]

The README.md file diff includes details on setting the google_api_key and model, noting the gemini-pro-1.5 model's capacity to handle an input context length of 1 million tokens. It also highlights various predefined patchflows in Patchwork, such as AutoFix, DependencyUpgrade, PRReview, GenerateREADME, and ResolveIssue, showcasing specific functionalities offered by the platform.

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• File changed: README.md
  The diff in the README.md file adds information about setting the google_api_key and model, specifically mentioning the gemini-pro-1.5 model's capability to support an input context length of 1 million tokens. Additionally, the diff highlights the predefined patchflows in Patchwork, emphasizing specific functionalities such as AutoFix, DependencyUpgrade, PRReview, GenerateREADME, and ResolveIssue.