RP-949 Update jdx/mise-action to v4 in promote action

[jerome-chetelat-sonarsource]

Updating mise-action to v4 to fix failing python 3.13 installation. This version of the action also uses Node.js 24 for the upcomming deprecation of Node.js 20 in GHA runners.

[hashicorp-vault-sonar-prod]

RP-949

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sonar-review-alpha]

Summary

Updates the jdx/mise-action dependency from v3.6.3 to v4.0.1 in the promote action workflow, along with bumping the mise version from 2026.3.7 to 2026.4.0. These updates address Python 3.13 installation failures and prepare for Node.js 20 deprecation in GitHub Actions.

What reviewers should know

This is a straightforward dependency update confined to a single file (promote/action.yml). Key points for review:

1. File scope: Only promote/action.yml is modified — the promote action's workflow configuration.
2. Changes: Two version updates on lines 60-61 (the mise-action action reference) and line 63 (the mise version input).
3. What to verify: Confirm that mise-action v4.0.1 is stable and that the changes don't break the promote action workflow. You may want to check if there are any breaking changes in mise-action v4 or the new mise version (2026.4.0) that could affect this workflow.
4. Context: The promote action handles artifact promotion via Artifactory and GitHub—these version updates maintain compatibility with current GitHub Actions environments.

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[sonar-review-alpha]

LGTM! ✅

Clean, minimal version bump with no logic changes. No issues found.

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[matemoln]

Closing this in favor of #232 and #111. Thanks @jerome-chetelat-sonarsource for reporting the issue!