correct default value for put_container() method

Author: knonomura

docs/PHPAPIReference.files/sheet002.htm

@@ -722,7 +722,7 @@
   <td class=xl65 width=434 style='border-top:none;border-left:none;width:326pt'>Container
   put_container(string $containerName, array&lt;array columnInfo&gt;
   $columnInfolist, GSContainerType $containerType, bool $modifiable=false, bool
-  $rowKeyAssigned=null, bool $columnOrderIgnorable=null, int
+  $rowKeyAssigned=true, bool $columnOrderIgnorable=false, int
   $rowExpirationTime=null, GSTimeUnit $rowExpirationTimeUnit=null, int
   $expirationDivisionCount=null)</td>
   <td class=xl65 width=454 style='border-top:none;border-left:none;width:341pt'>Newly