Update README.md

Co-authored-by: Duncan Dewhurst <[email protected]>

README.md

@@ -52,7 +52,7 @@ The following JSON snippet models a contracting process where fees are applied t
 }
 ```
 
-The following JSON snippet models a contracting process where fees are calculated as a percentage of the awarded contract value.
+The following JSON snippet models a contracting process with a participation fee of 5% of the award value, payable by the winning bidder.
 
 ```json
 {