Merge pull request #19932 from mozilla/fix_terms-url

fix(auth): Fix Terms URL for Stay subscribed email

Author: xlisachan

packages/fxa-auth-server/lib/payments/subscription-reminders.ts

@@ -240,7 +240,7 @@ export class SubscriptionReminders {
             purchase.purchaseDetails.localizations.at(0)?.webIcon ||
             purchase.purchaseDetails.webIcon,
           churnTermsUrl: new URL(
-            `${this.paymentsNextUrl}/${offeringId}/${priceSubplatInterval}/stay-subscribed/loyalty-discount/terms`
+            `${this.paymentsNextUrl}/${offeringId}/${priceSubplatInterval}/stay_subscribed/loyalty-discount/terms`
           ).toString(),
           ctaButtonLabel: cmsChurnInterventionEntry?.ctaMessage,
           ctaButtonUrl: new URL(