Update index.html

docs/index.html

@@ -1306,8 +1306,8 @@ <h3 id="information">Information hierarchy (Semantic page structure) </h3>
   <li>any user with special needs (for example impaired vision) who uses a screen-reader, will rely on the HTML to read the page</li>
   <li>headings and sub-headings should follow a logical hierarchy</li>
   <li>only one H1 header (always page title). Make sure headers and sub-headers are labelled correctly for screen readers</li>
-  <li>The second heading on a page should be a h2, any subheadings to this section a h3. You can have more than one h2</li>
-<li>heading levels can never be skipped on the way down (h1, h2, h3, h4, h5 and h6) but can be on the way up (h4, h2)</li>
+  <li>The second heading on a page should be a H2, any subheadings to this section a h3. You can have more than one H2</li>
+<li>heading levels can never be skipped on the way down (H1, H2, H3, H4, H5 and H6) but can be on the way up (H4, H2)</li>
 
 </ul>