chore(ci): upgrade GitHub Actions to Node 24

[daymade]

Summary

• Upgrade GitHub-maintained JavaScript Actions to Node 24-compatible majors.
• Update the directly affected active documentation examples.
• Keep project runtimes and workflow behavior unchanged.

Validation

• actionlint passed for the migrated workflows.
• Every referenced remote action manifest was checked for a non-legacy runtime.
• Documentation consistency search and git diff --check passed.