VCST-5239,VCST-5159-vcst-qa-deployment

[vc-ci]

ci: Automated update vc-frontend from PR 2377 VirtoCommerce/vc-frontend#2377

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Note

Low Risk
Single configuration URL swap for a prerelease theme package with no backend or auth changes.

Overview
Automated QA deployment — updates the B2B Vue theme package pointer in theme/artifact.json from the PR 2354 prerelease zip to the PR 2377 build (vc-theme-b2b-vue-2.53.0-pr-2377-b438-b43820e7.zip).

No application code changes; this only switches which frontend theme artifact VCST QA pulls during deployment (linked to upstream vc-frontend#2377).

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