Fix Node.js 20 action deprecation warnings across all workflows

[Copilot]

GitHub is deprecating Node.js 20 actions runners (forced migration to Node.js 24 on June 2, 2026). All five flagged actions needed remediation.

Priority*

• High: This PR needs to be merged first, before other tasks.
• Medium: This PR should be merged quickly to prevent conflicts due to common changes. (default)
• Low: This PR does not affect other tasks, so it can be merged later.

Purpose of the PR*

Eliminate Node.js 20 action deprecation warnings and ensure workflows remain functional after the June 2026 forced Node.js 24 migration.

Changes*

Actions upgraded to node24-native versions (across release.yml, build-zip.yml, e2e.yml, prettier.yml, greetings.yml):

Action	Before	After
actions/checkout	@v4 (node20)	@v6 (node24)
actions/setup-node	@v4 (node20)	@v6 (node24)
actions/upload-artifact	@v4 (node20)	@v7 (node24)
actions/first-interaction	@v1 (node20)	@v3 (node24)

Actions without a node24 release yet — pnpm/action-setup@v4 and softprops/action-gh-release@v2 both still ship using: node20. Added FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true at the job level in every job that uses them:

jobs:
  release:
    runs-on: ubuntu-latest
    env:
      FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true  # covers pnpm/action-setup + action-gh-release

Affected jobs: release (release.yml), build (build-zip.yml), chrome + firefox (e2e.yml).

greetings.yml: Updated first-interaction input names from hyphenated to underscored (repo_token, issue_message, pr_message) to match the v3 action API.

release.yml: Also added a version-sync step that strips the v prefix from the triggering tag and runs bash-scripts/update_version.sh before the build, so all package.json files are stamped with the release version automatically.

How to check the feature

Trigger the release workflow (or any other workflow) and confirm no "Node.js 20 actions are deprecated" warnings appear in the job logs.

Reference

• GitHub deprecation announcement
• FORCE_JAVASCRIPT_ACTIONS_TO_NODE24 is the official opt-in env var for actions that haven't yet published a node24 build.

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