Update legacy-pricing.mdx to reflect am2 on-demand budgets (#13455)

reference on-demand budget instead of PAYG budget

Author: souredoutlook

docs/pricing/legacy-pricing.mdx

@@ -85,17 +85,17 @@ Depending on how you've configured profiling in your SDK, you will either be sen
   [FAQ.](https://sentry.zendesk.com/hc/en-us/articles/36024865135131)
 </Alert>
 
-Profile hours are determined by the length of the profile in milliseconds and is billed in hours. Partial hours are prorated and rounded down to the nearest cent. Profile Hours are only available through your Pay-as-you-go (PAYG) budget.
+Profile hours are determined by the length of the profile in milliseconds and is billed in hours. Partial hours are prorated and rounded down to the nearest cent. Profile Hours are only available through your on-demand budget.
 
 **Continuous Profile Hours**
 
-| Team PAYG    | Business PAYG |
+| Team On-Demand    | Business On-Demand |
 | ------------ | ------------- |
 | $0.0315/hour | $0.0315/hour  |
 
 **UI Profile Hours**
 
-| Team PAYG  | Business PAYG |
+| Team On-Demand  | Business On-Demand |
 | ---------- | ------------- |
 | $0.25/hour | $0.25/hour    |