Added note about using CSS to style headings

Author: ericwbailey

partials/section.headings.hbs

@@ -25,4 +25,9 @@
     <p>
         If I didn't have my parents to think about I'd have given in my notice a long time ago, I'd have gone up to the boss and told him just what I think, tell him everything I would, let him know just what I feel. He'd fall right off his desk! And it's a funny sort of business to be sitting up there at your desk, talking down at your subordinates from up there, especially when you have to go right up close because the boss is hard of hearing. Well, there's still some hope; once I've got the money together to pay off my parents' debt to him - another five or six years I suppose - that's definitely what I'll do. That's when I'll make the big change. First of all though, I've got to get up, my train leaves at five."
     </p>
+
+    <h2>Notes:</h2>
+    <p>
+        <small>Ensure that headings create a logical order. Apply <abbr="Cascading Style Sheets">CSS</abbr> classes to control visual presentation (e.g. <code>&lt;h2 class=&quot;type-size-medium color-blue-dark&quot;&gt;Our services&lt;/h2&gt;</code> ).</small>
+    </p>
 </section><!-- End of #section__headings -->