Release v0.21.2

What's Changed

• fix(patch): cherry-pick a6d1245 to release/v0.21.1-pr-15214 to patch version v0.21.1 and create version 0.21.2 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/15227

Full Changelog: https://github.com/google-gemini/gemini-cli/compare/v0.21.1...v0.21.2