Add windows build as an artefact to releases

[palas]

Changelog

- description: |
    - Added build for windows as an artefact for releases
  type:
  - feature

Context

We currently have binaries in releases for Linux and Mac OS, but not for Windows. Compiling from Windows is especially tricky, so users would especially benefit from being able to download binaries directly. In order to address this, this PR adds the result of the build with mingw32 as an artefact in releases.

How to trust this PR

See test run result: https://github.com/IntersectMBO/cardano-cli/releases/tag/untagged-b53131e2f2a938e8212f

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• New tests are added if needed and existing tests are updated. See Running tests for more details
• Self-reviewed the diff