fix: update Change Plan modal caption and fix broken Compute Confirmation link (supabase#36539)

* Pro Plan heading caption

* Fixed Comput costs docs link

* Revert to premium support

* Email support

* Fixed typing error in PaymentMethodSelection

Author: ignaciodob

apps/studio/components/interfaces/Organization/BillingSettings/Subscription/PaymentMethodSelection.tsx

@@ -287,7 +287,7 @@ const PaymentMethodSelection = forwardRef(function PaymentMethodSelection(
             <NewPaymentMethodElement
               ref={paymentRef}
               pending_subscription_flow_enabled={true}
-              email={selectedOrganization?.billing_email}
+              email={selectedOrganization?.billing_email ?? undefined}
               readOnly={readOnly}
             />
           </Elements>

apps/studio/components/interfaces/Organization/BillingSettings/Subscription/SubscriptionPlanUpdateDialog.tsx

@@ -43,7 +43,7 @@ const getRandomTweet = () => {
 
 const PLAN_HEADINGS = {
   tier_pro:
-    'the Pro plan and create unlimited projects, daily backups and premium support when you need it',
+    'the Pro plan to unlock unlimited projects, daily backups, and email support whenever you need it',
   tier_team: 'the Team plan for SOC2, SSO, priority support and greater data and log retention',
   default: 'to a new plan',
 } as const

apps/studio/pages/new/[slug].tsx

@@ -967,7 +967,7 @@ const Wizard: NextPageWithLayout = () => {
               monthly costs by ${additionalMonthlySpend}, independent of how actively you use it. By
               clicking "Confirm", you agree to the additional costs.{' '}
               <Link
-                href="/docs/guides/platform/manage-your-usage/compute"
+                href="https://supabase.com/docs/guides/platform/manage-your-usage/compute"
                 target="_blank"
                 className="underline"
               >