updating headers of fixture

tests/unit/search/fixtures/page-with-sections.html

@@ -10,21 +10,21 @@
   
   <h1>I am the page title</h1>
 
-  <h3 id="in-this-article">In this article</h3>
+  <h2 id="in-this-article">In this article</h2>
   <p>This should be ignored.</p>
 
-  <h3 id="first">First heading</h3>
+  <h2 id="first">First heading</h2>
   <p>Here's a paragraph.</p>
 
   <p>And another. </p>
 
-  <h3 id="second">Second heading</h3>
+  <h2 id="second">Second heading</h2>
   <p>Here's a paragraph in the second section.</p>
 
   <p>And another.</p>
 
-  <h3 id="further-reading">Further reading</h3>
+  <h2 id="further-reading">Further reading</h2>
   <p>This should be ignored.</p>
 </div>
 
-<h3 id="outside-the-article">This is out the article tag so it should be ignored</h3>
+<h2 id="outside-the-article">This is out the article tag so it should be ignored</h2>