Fix documentation #17533

Created by: phmasek

Added information about how the h1-h6 element size are overridden if .panel-title is used. Fixes #17533 (closed).

docs/_includes/components/panels.html

@@ -21,7 +21,7 @@
 {% endhighlight %}
 
   <h2 id="panels-heading">Panel with heading</h2>
-  <p>Easily add a heading container to your panel with <code>.panel-heading</code>. You may also include any <code>&lt;h1&gt;</code>-<code>&lt;h6&gt;</code> with a <code>.panel-title</code> class to add a pre-styled heading.</p>
+  <p>Easily add a heading container to your panel with <code>.panel-heading</code>. You may also include any <code>&lt;h1&gt;</code>-<code>&lt;h6&gt;</code> with a <code>.panel-title</code> class to add a pre-styled heading. However the sizes of <code>&lt;h1&gt;</code>-<code>&lt;h6&gt;</code> are overridden by <code>.panel-heading</code>.</p>
   <p>For proper link coloring, be sure to place links in headings within <code>.panel-title</code>.</p>
   <div class="bs-example" data-example-id="panel-with-heading">
     <div class="panel panel-default">