Clarify compute credit limit

Author: rchinn1

src/engage/product-limits.md

@@ -52,7 +52,7 @@ To learn more about custom limits and upgrades, contact your dedicated Customer
 | Step Name       | Maximum length of 170 characters | Once the limit is reached, you cannot add additional characters to the name. |
 | Key             | Maximum length of 255 characters | Once the limit is reached, you cannot add additional characters to the key.  |
 | Journey Name    | Maximum length of 73 characters  | Once the limit is reached, you cannot add additional characters to the name. |
-| Compute credits | Half a credit for each step      | Each step in a published Journey consumes half of one compute credit.        |
+| Compute credits | Half a credit for each step (up to 250 compute credits)     | Each step in a published Journey consumes half of one compute credit.        |
 
 
 ## Channels