Fix typo in supports algorithm (#12)

Author: tniessen

index.html

@@ -232,7 +232,7 @@ <h3>Checking support for an algorithm</h3>
       <ol>
         <li>
           <p>
-            If |op| is "`deriveKey`", set |op| is "`deriveBits`".
+            If |op| is "`deriveKey`", set |op| to "`deriveBits`".
           </p>
         </li>
         <li>