chore: Tidy up document using tidy-html5 (#351)

Co-authored-by: marcoscaceres <[email protected]>

Author: github-actions[bot]

index.html

@@ -931,8 +931,8 @@ <h2>
         };
       </pre>
       <p>
-        <a>PushMessageData</a> objects have an associated [=byte sequence=] set on
-        creation, which is `null` if there was no data in the <a>push message</a>.
+        <a>PushMessageData</a> objects have an associated [=byte sequence=] set on creation, which
+        is `null` if there was no data in the <a>push message</a>.
       </p>
       <p>
         The <dfn>arrayBuffer()</dfn> method, when invoked, MUST return an {{ArrayBuffer}} whose