cmux v0.64.1

What's Changed

• Fix sidebar workspace close hover state by @austinywang in https://github.com/manaflow-ai/cmux/pull/3546
• Release v0.64.1 by @austinywang in https://github.com/manaflow-ai/cmux/pull/3549

Full Changelog: https://github.com/manaflow-ai/cmux/compare/v0.64.0...v0.64.1