Update cinematics.adoc

Corrected MotionEvent description on how to create a MotionEvent.

src/docs/asciidoc/jme3/advanced/cinematics.adoc

@@ -115,7 +115,7 @@ Details of the constructor:
 
 To create a MotionEvent, do the following:
 
-.  <<jme3/advanced/motiontrack#,Create a MotionEvent>>
+.  Create a MotinPath.
 .  Create a MotionEvent based on the MotionPath.
 .  Configure your MotionEvent (see below).
 .  Add the MotionEvent to a Cinematic.