Fix wxEVT_COMMAND_DATAVIEW_COLUMN_HEADER_CLICK name in the documentation.

Unlike the corresponding event table macro, it doesn't have "ED" suffix.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73821 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775