Update GitHub actions

[c72578]

• Update actions/checkout [1] from v3 to v4 This fixes the following warning: build (windows-2022) Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3.
• Update actions/upload-artifact [2] from v3 to v4 The SHA256 hash of the uploaded zip file is now logged.

[1] https://github.com/actions/checkout [2] https://github.com/actions/upload-artifact

[c72578]

Example of logged SHA256 hash of uploaded zip file: SHA256 hash of uploaded artifact zip is ce24e76e9a7551647569624c8897aab298e2fa6c5461c742911573e583e21ac1 https://github.com/c72578/cuetools.net/actions/runs/8028989195/job/21934782648#step:9:19