Add examples for test new img loading attribute

Author: yunusga

tests/html/example2.html

@@ -46,6 +46,8 @@ <h1>Example Domain</h1>
  <p>This domain is established to be used for illustrative examples in documents. You may use this
  domain in examples without prior coordination or asking for permission.</p>
  <p><a href="http://www.iana.org/domains/example">More information...</a></p>
+ <p><img src="noimage.jpg" loading="lazy" alt=""></p>
+ <p><img src="noimage.jpg" loadin="lazy" alt=""></p>
  <ul>
  <div><span>Item 1</span></div>
  <li><p>Item 2</p></li>