Fix the QTouchEventSequence code snippet so that it compiles

The release() function also requires the QPoint to be set which was
missing from the code snippet.

Change-Id: I4a5cd2bed0915eb1fbaac3a34fb229eac9c284df
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Reviewed-by: Geir Vattekar <geir.vattekar@digia.com>

src/testlib/doc/snippets/code/src_qtestlib_qtestcase.cpp

@@ -229,8 +229,8 @@ QTest::touchEvent(&widget)
     .move(0, QPoint(12, 12))
     .move(1, QPoint(45, 5));
 QTest::touchEvent(&widget)
-    .release(0)
-    .release(1);
+    .release(0, QPoint(12, 12))
+    .release(1, QPoint(45, 5));
 //! [25]