Doc: Use correct module name

QML: Importing Qt3D.Scene2D doesn't work, QtQuick.Scene2D does.
CPP: Specify header file, as convenience header doesn't exist.

Task-number: QTBUG-67370
Change-Id: Ia53e92c076f52bbb81b91370425279c44bf9e3c5
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

src/doc/src/qt3dscene2d-module.qdoc

@@ -69,7 +69,7 @@
  */
 
 /*!
-   \qmlmodule Qt3D.Scene2D 2.9
+   \qmlmodule QtQuick.Scene2D 2.11
    \preliminary
    \title Qt 3D Scene2D QML Types
    \ingroup qmlmodules
@@ -80,6 +80,6 @@
    To import and use the module's QML types, use the following statement:
 
    \badcode
-   import Qt3D.Scene2D 2.9
+   import QtQuick.Scene2D 2.11
    \endcode
 */

src/quick3d/quick3dscene2d/items/qscene2d.cpp

@@ -54,6 +54,7 @@ namespace Quick {
 
 /*!
     \class Qt3DRender::Quick::QScene2D
+    \inheaderfile Qt3DQuickScene2D/QScene2D
     \inmodule Qt3DScene2D
 
     \brief This class enables rendering qml into a texture, which then can be
@@ -73,7 +74,7 @@ namespace Quick {
 
 /*!
     \qmltype Scene2D
-    \inqmlmodule Qt3D.Scene2D
+    \inqmlmodule QtQuick.Scene2D
     \since 5.9
     \instantiates Qt3DRender::Quick::QScene2D