Update to Node.js 24 runtime

[jonas-stjernquist]

Problem:

The container-update-image and deploy-script/action.yml action declares using: 'node20'. GitHub Actions is deprecating Node.js 20 as of September 2025 and will force all actions onto Node.js 24 by default starting June 2, 2026. After that date, actions still using node20 may break.

Fix:

1. Upgrade the action's dependencies and rebuild lib-action/index.js against Node.js 24.
2. Change using: 'node20' → using: 'node24' in container-update-image/action.yml.
3. Change using: 'node20' → using: 'node24' in deploy-script/action.yml.
4. Change using: 'node20' → using: 'node24' in .github/actions/setup-project/action.yml.

Reference:

• GitHub Actions Node.js 20 deprecation announcement
• Similar PRs landed in docker/login-action (#929) and docker/build-push-action (#1470) — both are good references for the pattern.

Workaround in use until fixed:

env:
  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true

I dont have a javascript development environment on my machine, otherwise I could help you with an pull request.