Update dependency github:coreos/butane to v0.29.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github:coreos/butane	tools	minor	0.26.0 → 0.29.0

---

Release Notes

coreos/butane (github:coreos/butane)

v0.29.0

Compare Source

Breaking changes

Roll back OpenShift spec 4.22.0 to Ignition spec 3.5.0. Butane 0.28.0 stabilized 4.22.0 targeting Ignition 3.6.0 (#​704), but OCP 4.22's Machine Config Operator does not support Ignition 3.6.0 (OCPBUGS-90256). Configs must be re-transpiled with an updated Butane.

Misc. changes

Add support for pretty error reporting, can be controlled through the use of --raw-errors (disable) and --color/--colour

v0.28.0

Compare Source

Starting with this release, Butane binaries are signed with the Fedora 44
key.

Features

• Stabilize OpenShift spec 4.22.0, targeting Ignition spec 3.6.0
• Add OpenShift spec 4.23.0-experimental, targeting Ignition spec 3.7.0-experimental
• Add systemd.quadlets section for embedding Podman Quadlet files (fcos 1.8.0-exp, fiot 1.1.0-exp, flatcar 1.2.0-exp, openshift 4.23.0-exp, r4e 1.2.0-exp)

Misc. changes

• Warn on root partition size is too small (fcos 1.3.0+)
• Warn on root partition constrained by another partition (fcos 1.3.0+)

v0.27.0

Compare Source

Butane 0.27.0 (2026-02-27)

Features

• Stabilize Fcos spec 1.7.0, targeting Ignition spec 3.6.0
• Add Fcos spec 1.8.0-experimental, targeting Ignition spec 3.7.0-experimental
• Update Flatcar spec 1.2.0-experimental to target Ignition spec 3.7.0-experimental
• Update Fiot spec 1.1.0-experimental to target Ignition spec 3.7.0-experimental
• Update R4E spec 1.2.0-experimental to target Ignition spec 3.7.0-experimental
• Update OpenShift spec 4.22.0-experimental to target Ignition spec 3.7.0-experimental

Docs changes

• Re-vendor latest ignition release; 3.6.0-experimental becomes 3.6.0

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.