avoid language of legacy

Author: dashed

src/docs/product/accounts/pricing.mdx

@@ -46,7 +46,7 @@ You can set a maximum monthly on-demand invoice amount by setting an on-demand b
 
 <Note>
 
-Per-category on-demand budgets are only available on plans with [performance monitoring](/product/performance/) features. Customers on legacy plans can only use the shared on-demand budget strategy.
+Per-category on-demand budgets are only available on plans with [performance monitoring](/product/performance/) features. Customers on plans without performance monitoring can only use the shared on-demand budget strategy.
 
 </Note>