Backslashes in released zip archives paths

[tansy]

Describe the bug

In relased zip archives tgere are backslashes in paths. Zip uses forward slash as path separator.

It's a problem add not all un/zip clients assume \ to be a /.

To Reproduce

Get the released archives and see the path names, like cmake\hwy\hwy-config-release.cmake.

Expected behavior

To use forward slashed as path separator in zips.

Environment

• OS: Linux

Additional context

specification is clear about that:

4.4.17.1 The name of the file, with optional relative path.
The path stored MUST NOT contain a drive or
device letter, or a leading slash. All slashes
MUST be forward slashes '/'