Fix what looks like a copy-paste blunder in a Welcome Screen tutorial.

Change-Id: I8c574ac464f9e20479be7f5aba0f85e387ea4c3b
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

share/qtcreator/welcomescreen/widgets/Delegate.qml

@@ -146,7 +146,7 @@ Rectangle {
         id: descriptionItem
         height: 43
         color: "#7e7e7e"
-        text: qsTr("The 2D Painting example shows how QPainter and QGLWidget. The 2D Painting example shows how QPainter and QGLWidget work together.")
+        text: qsTr("The 2D Painting example shows how QPainter and QGLWidget work together.")
         anchors.top: captionItem.bottom
         anchors.topMargin: 10
         opacity: 0