BUILD-10765 Update gh-action_release to v6.4.0

[mikolaj-matuszny-ext-sonarsource]

Summary

• Update gh-action_release to v6.4.0 (7b055eca5ce771ff254fbec2697c0fc1c7207e1e)

See: https://discuss.sonarsource.com/t/action-required-update-your-github-actions-cache-release-and-releasability-before-16-03/23899

Test plan

• Verify release workflow runs successfully

[sonar-review-alpha]

Summary

Updates the gh-action_release GitHub Action from v6.1.0 to v6.4.0 in both test and production release workflows. This is a required update per SonarSource guidance to ensure GitHub Actions cache and releasability compatibility.

What reviewers should know

Changes: Only .github/workflows/release.yml is modified — both the test release job (lines 14) and production release job (lines 23) have identical version updates, with the commit hash pinned for reproducibility.

For reviewers: Check the gh-action_release v6.4.0 release notes to confirm there are no breaking changes or new configuration requirements. The test plan (verify the workflow runs successfully) should catch any issues, but familiarizing yourself with what changed in the action can help spot any edge cases specific to this project's Python packaging setup.

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[hashicorp-vault-sonar-prod]

BUILD-10765

[sonar-review-alpha]

Conclusion: Minimal, mechanical update — both release jobs are consistently bumped to the same pinned commit hash. No logic changes, no new configuration, nothing to trip over.

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[sonarqube-next]

Quality Gate passed for 'Python Scanner'

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
0 Dependency risks
No data about Coverage
No data about Duplication

See analysis details on SonarQube

[marc-jasper-sonarsource]

LGTM.