fix javadoc defect for ColumnWriteFragment

Author: nathan.xu

hibernate-core/src/main/java/org/hibernate/sql/model/ast/ColumnWriteFragment.java

@@ -16,7 +16,7 @@
 
 /**
  * Models a column's value expression within the SQL AST. Used to model:<ul>
- *     <li>a column's new value in a SET clause</li>
+ *     <li>a new column's value in an INSERT clause</li>
  *     <li>a column's new value in a SET clause</li>
  *     <li>a column's old value in a restriction (optimistic locking)</li>
  * </ul>