repo fix command incorrect workspace property on windows

[vinzscam]

Hey, I just made a Pull Request!

Fixes for https://github.com/backstage/community-plugins/pull/361#issuecomment-2087095343

It looks like on Windows the repo fix command had the side effect to set the workspace property using the wrong path separators.

:heavy_check_mark: Checklist

• [x] A changeset describing the change and affected packages. (more info)
• [ ] Added or updated documentation
• [ ] Tests for new functionality and regression tests for bug fixes
• [ ] Screenshots attached (for UI changes)
• [x] All your commits have a Signed-off-by line in the message. (more info)

[backstage-goalie[bot]]

Changed Packages

Package Name	Package Path	Changeset Bump	Current Version
@backstage/cli	packages/cli	patch	v0.26.5-next.0

[github-actions[bot]]

Uffizzi Cluster pr-24621 was deleted.

[github-actions[bot]]

Thank you for contributing to Backstage! The changes in this pull request will be part of the 1.27.0 release, scheduled for Tue, 14 May 2024.