docs(workflows): update examples to include GCA auth

[galz10]

The example workflows for the CLI, issue triage, and PR review have been updated to include the necessary environment variables for authenticating with Gemini Code Assist ( and ).

This makes the examples consistent with the new GCA authentication feature.

[gemini-cli]

📋 Review Summary

This pull request updates the example workflows to include the new environment variables required for Gemini Code Assist (GCA) authentication. The changes are clear, consistent, and correctly applied across all relevant files.

🔍 General Feedback

The updates are straightforward and effectively bring the documentation examples in line with the new authentication feature. The changes are consistent and well-contained.

🎯 Specific Feedback

No specific issues identified in this review.

✅ Highlights

• Consistency: The same required variables were added to all four example workflows, ensuring a consistent experience for users referencing them.
• Clarity: The change directly addresses the need to document the new authentication variables, improving the usability of the examples.
• Accuracy: The added variables (GOOGLE_GENAI_USE_GCA and SERVICE_ACCOUNT_EMAIL) correctly reflect the new requirements for GCA authentication.