fix: broken update command

[vladdoster]

Description

zinit update works again

Related Issue(s)

Closes #507 Closes #502

Types of changes

• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [X] Bug fix (non-breaking change which fixes an issue)
• [ ] Documentation change
• [ ] New feature (non-breaking change which adds functionality)

Checklist:

• [X] All new and existing tests passed.
• [ ] I have added tests to cover my changes.
• [ ] I have updated the documentation accordingly.

[github-actions[bot]]

:tada: This PR is included in version 3.11.0 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: