Changed container_h2 to container_h1 in 2-browser-apps/08-css-arrangement/_samples/exercise

Author: tsatohiro

docs/2-browser-apps/08-css-arrangement/_samples/exercise/style.css

@@ -30,7 +30,7 @@ h1 {
   color: #000;
 }
 
-#container h2 {
+#container h1 {
   margin: 10px 0;
   font-weight: normal;
 }