Filter highlightAll: Fixed typo (#2391)

Author: RunDevelopment

plugins/filter-highlight-all/index.html

@@ -116,7 +116,7 @@ <h1>Examples</h1>
 	<p>Prism will ignore these blocks, so you can even define your own static highlighting which Prism would normally remove.</p>
 
 	<pre class="language-css"><code class="language-css">a.link::before {
-	cont<span class="token selector">ent: 'I just do my o</span>wn highlighted';
+	cont<span class="token selector">ent: 'I just do my o</span>wn highlighting';
 	color: <span class="token constant">#F00</span>;
 }</code></pre>