Doc: QPropertyAnimation does not update target property when stopped

When stopped, an animations's currentValue can change as a result of
changes to the the start- or end value. The target property will not
be updated, however.

Fixes: QTBUG-125586
Pick-to: 6.8 6.5
Change-Id: Ib03133db80e92b4d73a1140e9a94d6d7a6b68fc4
Reviewed-by: Sze Howe Koh <[email protected]>
(cherry picked from commit 25fbbb5)
Reviewed-by: Qt Cherry-pick Bot <[email protected]>

Author: aavit

src/corelib/animation/qpropertyanimation.cpp

@@ -230,7 +230,7 @@ bool QPropertyAnimation::event(QEvent *event)
 /*!
     This virtual function is called by QVariantAnimation whenever the current value
     changes. \a value is the new, updated value. It updates the current value
-    of the property on the target object.
+    of the property on the target object, unless the animation is stopped.
 
     \sa currentValue, currentTime
  */