fixing typo

Author: howcom

css3-gcpm/Overview.src.html

@@ -3043,7 +3043,7 @@ <h3>Exclusions based on images</h3>
 </div>
 
 <div class=example>
-<img src=car1.jpg>
+<img src=car2.jpg>
 <pre>
 article {
   padding: 4em;