fix: use regex instead of string literal for /yr text match in TotalAfterTrialRow test#173

Copilot wants to merge 2 commits intomainedx/frontend-app-enterprise-checkout:mainfrom

copilot/fix-total-after-trial-row-testedx/frontend-app-enterprise-checkout:copilot/fix-total-after-trial-row-testCopy head branch name to clipboard