VCST-4672-vcst-qa-deployment

[vc-ci]

ci: Automated update vc-frontend from PR 2196 VirtoCommerce/vc-frontend#2196

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Note

Low Risk
Single configuration change to an external artifact URL; risk is limited to potential build/deploy failures if the prerelease package is missing or incompatible.

Overview
Updates theme/artifact.json to point the theme artifact download URL from the vc-frontend 2.42.0 GitHub release to a 2.43.0 prerelease package produced by vc-frontend PR 2196.

^{Written by Cursor Bugbot for commit 64eb61f. This will update automatically on new commits. Configure here.}

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