Update draft-irtf-cfrg-vdaf.md

Co-authored-by: Christopher Patton <[email protected]>

draft-irtf-cfrg-vdaf.md

@@ -2414,7 +2414,7 @@ The joint randomnesses computation involves the following steps:
 
 1. Compute a "joint randomness part" from each measurement share and blind
 1. Compute a "joint randomness seed" from the joint randomness parts
-1. Compute multiple joint randomnesses from the joint randomness seed
+1. Compute the joint randomness for each proof evaluation from the joint randomness seed
 
 This three-step process is designed to ensure that the joint randomnesses do
 not leak the measurement to the Aggregators while preventing a malicious Client