ci: gate Deploy changesets job to push events only (2026-07-rc)#4472

andy-chhuon wants to merge 2 commits into

2026-07-rcShopify/ui-extensions:2026-07-rcfrom

andychhuon/deploy-changesets-push-guard-2026-07-rcShopify/ui-extensions:andychhuon/deploy-changesets-push-guard-2026-07-rcCopy head branch name to clipboard