Upload fribidi.dll to GitHub Actions

[nulano]

Changes suggested:

• In light of Windows Wheels from Christoph Gohlke Going Away Forever #6369, provide an alternative place to download an up-to-date fribidi.dll on GitHub Actions. See run on my fork for an example: https://github.com/nulano/Pillow/actions/runs/2921960148

[radarhere]

provide an alternative place to download an up-to-date fribidi.dll on GitHub Actions

An alternative to what? Is this something that cgohlke was providing?

[nulano]

cgohlke was providing a libraqm‑0.7.1.dll.zip, which contains both a libraqm.dll for older Pillow versions and a fribidi-0.dll for newer Pillow versions, as well as the relevant license files: libraqm-0.7.1.dll.zip

This PR adds a fribidi artifact to the GHA runs, containing just a fribidi.dll and its license: fribidi.zip

[radarhere]

I've realised now this is connected to this part of the installation procedure.