Todo: Fix include

...and qbs build.
Amends d4e44b920d.

Change-Id: I6fc37ae0f6528c0099bf77a9d819379a7bed23f1
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>

src/plugins/todo/todooutputpane.cpp

@@ -6,6 +6,7 @@
 
 #include "constants.h"
 #include "todoitemsmodel.h"
+#include "todoitemsprovider.h"
 #include "todooutputtreeview.h"
 #include "todotr.h"
 
@@ -20,7 +21,6 @@
 #include <QToolButton>
 #include <QButtonGroup>
 #include <QSortFilterProxyModel>
-#include <todoitemsprovider.h>
 
 namespace Todo::Internal {