Fix grammar in digest verification for related resources.

Co-authored-by: Ted Thibodeau Jr <tthibodeau@openlinksw.com>

index.html

@@ -3206,10 +3206,11 @@ <h2>Integrity of Related Resources</h2>
 
         <p>
 A [=conforming verifier implementation=] that makes use of a resource based on
-the `id` of an object inside a [=conforming document=] with a corresponding
-cryptographic digest MUST check the digest against the retrieved resource. If
-the digest of the retrieved resource does not match the one provided by the
-[=issuer=], the [=conforming verifier implementation=] MUST produce an error.
+the `id` of a `relatedResource` object inside a [=conforming document=] with a
+corresponding cryptographic digest appearing in a `relatedResource` object value
+MUST compute the digest of the retrieved resource. If the digest provided by the
+[=issuer=] does not match the digest computed for the retrieved resource, the
+[=conforming verifier implementation=] MUST produce an error.
         </p>
 
         <p>