Fix grammar in normative requirements wrt. context processing.

Co-authored-by: Ted Thibodeau Jr <[email protected]>

index.html

@@ -5905,8 +5905,8 @@ <h3>Base Context</h3>
 <a href="https://www.w3.org/TR/json-ld11-api/#expansion-algorithm">
 JSON-LD Expansion</a> or
 <a href="https://www.w3.org/TR/json-ld11/#serializing-deserializing-rdf">
-transformation to RDF</a> are expected to do so without experiencing any
-errors. If operations of this type are performed, and the result is an error,
+transformation to RDF</a>, are expected to do so without experiencing any
+errors. If such operations are performed and result in an error,
 the <a>verifiable credential</a> or <a>verifiable presentation</a> MUST result
 in a verification failure.
         </p>