Reference UTF-8 encoding algorithm (#353)

Author: twiss

spec/Overview.html

@@ -27,7 +27,7 @@
         github: "https://github.com/w3c/webcrypto",
         shortName: "WebCryptoAPI",
         group: "webappsec",
-        xref: ['html', 'dom', 'webidl', 'infra'],
+        xref: ['html', 'dom', 'webidl', 'infra', 'encoding'],
         localBiblio: {
         "JWA": {
         aliasOf: "RFC7518"
@@ -2422,9 +2422,7 @@ <h4>The wrapKey method</h4>
                       </li>
                       <li>
                         <p>
-                          Let |bytes| be the [= byte sequence =] containing the result of converting
-                          |json|, a JavaScript String comprised of UTF-16 code points, to
-                          UTF-8 code points.
+                          Let |bytes| be the result of [= UTF-8 encode | UTF-8 encoding =] |json|.
                         </p>
                       </li>
                     </ol>