give the grid wrapper recipe HTML textarea a bit more height so it can be played with more easily

Author: chrisdavidmills

css-cookbook/grid-wrapper.html

@@ -103,7 +103,7 @@
   }
   </textarea>
 
-  <textarea class="playable playable-html" style="height: 70px;">
+  <textarea class="playable playable-html" style="height: 170px;">
   <div class="grid">
 
     <div class="wrapper">
@@ -132,4 +132,4 @@
 </body>
 <script src="playable.js"></script>
 
-</html>
+</html>