Build Arch based OSTree ISO

Version updated for https://github.com/ImmutableArch/arch-container-installer-builder to version 0.1.1.

• This action is used across all versions by ? repositories.

Go to the GitHub Marketplace to find the latest changes.

Release notes

Full Changelog: https://github.com/ImmutableArch/arch-container-installer-builder/compare/0.1...0.1.1

• ImmutableArch
• GitHub Actions