Release v0.28.1

What's Changed

• fix(patch): cherry-pick 37f128a to release/v0.28.0-pr-18478 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/18821

Full Changelog: https://github.com/google-gemini/gemini-cli/compare/v0.28.0...v0.28.1