chore: bump version to 1.12.0-dev#5060

Manciukic merged 1 commit intofirecracker-microvm:mainfirecracker-microvm/firecracker:mainfrom

Manciukic:bump-version-to-1.12.0-devManciukic/firecracker:bump-version-to-1.12.0-devCopy head branch name to clipboard