Offer official aarch64 builds

[bwRavencl]

Builds for arm64 are already supported by the build process, and arm64 runners are now offered for free GitHub:
https://github.blog/changelog/2025-01-16-linux-arm64-hosted-runners-now-available-for-free-in-public-repositories-public-preview/

Since vJoy is not available on Windows arm64, only Linux would be useful at this time.

To-Do's:

• Extend .github/workflows/release.yml
• Update README.md

To-Do's in other repos:

• bwRavencl/ControllerBuddy-Install-Script

  • Handle in platform check
  • Handle in download link lookup
  • Update README.md

• bwRavencl/ControllerBuddy-Pages

  • Update What are the hardware and software requirements? entry of FAQ section in index.md

• bwRavencl/ControllerBuddy-Flatpak

  • Handle different URLs in manifest
  • Remove flathub.json