[mremond]

Why

The CI runs showed a Node.js 20 deprecation warning and a notice that the ubuntu-latest label moves to Ubuntu 26.04.

What changed

• The workflows use the current major of each GitHub action, which runs on Node.js 24, so the Node.js 20 warning no longer applies.
• Jobs that ran on ubuntu-latest name ubuntu-26.04 explicitly, so the runner image changes only when the project chooses it.

Before and after

Before: The workflows used the v4 majors of the GitHub actions and the ubuntu-latest label, which GitHub is moving to Ubuntu 26.04.

After: The workflows use node24 action majors and the ubuntu-26.04 label. On the new run, the Node.js 20 warning and the Ubuntu notice are gone. The macOS arm64 capacity notice remains: it is GitHub-side and the workflow cannot remove it without changing which macOS jobs run.

CI configuration only; no screen or visible output changes.

Checked

• CI on this version: All 21 checks succeeded; the annotations on the sampled jobs no longer include the Node.js 20 warning or the Ubuntu notice.
• Workflow YAML parses and the change-map unit tests pass: All four workflow and action files parse; 14 change-map tests pass.

How it was checked

CI on this change runs every job on ubuntu-26.04 and macos-latest.

Risk

Risk above low: Evidence, medium — Release workflow runs only on tags; covered indirectly by packaging job.; Dependencies, medium — Updates six GitHub action majors.

Full risk assessment

Dimension	Level	Why
Blast radius	low	Only CI and the release workflow files change.
Behavior	low	Product code and runtime behavior are unchanged.
Undo	low	Revert the commit to restore the previous pins.
Evidence	medium	Release workflow runs only on tags; covered indirectly by packaging job.
Sensitivity	low	No secrets or sign-ins are touched.
Novelty	low	Version bumps to existing majors.
Dependencies	medium	Updates six GitHub action majors.

Not done

The release workflow has not run on a tag; it is exercised only by the packaging job.