chore: clarify copy around Pro plan being per project

packages/shared-data/plans.ts

@@ -19,7 +19,7 @@ export const plans: PricingInformation[] = [
     id: 'tier_free',
     name: 'Free',
     nameBadge: '',
-    costUnit: '/ month',
+    costUnit: '/ month / project',
     href: 'https://supabase.com/dashboard/new/new-project',
     priceLabel: '',
     priceMonthly: 0,
@@ -47,7 +47,7 @@ export const plans: PricingInformation[] = [
     id: 'tier_pro',
     name: 'Pro',
     nameBadge: '',
-    costUnit: '/ month',
+    costUnit: '/ month / project',
     href: 'https://supabase.com/dashboard/new/new-project',
     priceLabel: 'From',
     warning: 'Usage-based plan',