fix links

docs/modules/ROOT/pages/jme3/advanced/update_loop.adoc

@@ -4,7 +4,7 @@
 :keywords: basegame, control, input, init, keyinput, loop, states, state
 
 
-Extending your application from xref:jme3/intermediate/simpleapplication.adoc[SimpleApplication] provides you with an update loop. This is where you implement your game logic (game mechanics).
+Extending your application from xref:jme3/intermediate/simpleapplication.adoc[com.jme3.app.SimpleApplication] provides you with an update loop. This is where you implement your game logic (game mechanics).
 
 Some usage examples: Here you remote-control NPCs (computer controlled characters), generate game events, and respond to user input.