Fix typo in wxColourDialog documentation

The code example in wxColourDialog documentation used
a wrong type to create wxColourDialog instance.

See #23793, #23794.

(cherry picked from commit 547d49f68bc9241f693e85a4731689ee6d2ac189)

interface/wx/colordlg.h

@@ -27,7 +27,7 @@
 
         wxColourData data;
         data.SetColour(initialColourToUse);
-        wxColourData dlg(this, &data);
+        wxColourDialog dlg(this, &data);
         dlg.Bind(wxEVT_COLOUR_CHANGED, [](wxColourDialogEvent& event) {
                     Redraw(event.GetColour());
                  });