Missed renaming initial value of justify-content

Author: fantasai

css3-flexbox/Overview.html

@@ -1942,7 +1942,7 @@ <h3 id=justify-content-property><span class=secno>8.2. </span> Axis
     <tr>
      <th>Initial:
 
-     <td>start
+     <td>flex-start
 
     <tr>
      <th>Applies to:
@@ -3610,7 +3610,7 @@ <h2 class=no-num id=property>Property index</h2>
 
      <td>flex-start | flex-end | center | space-between | space-around
 
-     <td>start
+     <td>flex-start
 
      <td>flex containers
 

css3-flexbox/Overview.src.html

@@ -1369,7 +1369,7 @@ <h3 id='justify-content-property'>
 			<td>flex-start | flex-end | center | space-between | space-around
 		<tr>
 			<th>Initial:
-			<td>start
+			<td>flex-start
 		<tr>
 			<th>Applies to:
 			<td>flex containers