fix broken link

docs/modules/ROOT/pages/jme3/beginner/hello_asset.adoc

@@ -338,7 +338,7 @@ As an exercise, let's try different ways of loading a scene. You will learn how
 
 Remember that there will be no `assets` folder in a final deployment. If you are going to use a zip, do not put it in the `assets` folder. Otherwise, you will likely get errors about a missing file. For final distribution, add it to your dist folder.
 
-.  link:https://github.com/jMonkeyEngine/wiki/raw/master/src/docs/resources/Scenes/Town/town.zip[Download the town.zip] sample scene.
+.  link:https://wiki.jmonkeyengine.org/Scenes/Town/town.zip[Download the town.zip] sample scene.
 .  Place the town.zip file in the top level directory of your JME3 project, like so:
 +
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docs/modules/ROOT/pages/jme3/beginner/hello_collision.adoc

@@ -23,7 +23,7 @@ image::jme3/beginner/beginner-scene.png[beginner-scene.png,360,281,align="center
 
 == Sample Code
 
-If you don't have it yet, link:https://github.com/jMonkeyEngine/wiki/raw/master/src/docs/resources/Scenes/Town/town.zip[download the town.zip] sample scene.
+If you don't have it yet, link:https://wiki.jmonkeyengine.org/Scenes/Town/town.zip[Download the town.zip] sample scene.
 
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@@ -298,7 +298,7 @@ For the scene, you load the `sceneModel` from a zip file, and adjust the size.
 
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-The file `town.zip` is included as a sample model in the JME3 sources – you can link:https://github.com/jMonkeyEngine/wiki/raw/master/src/docs/resources/Scenes/Town/town.zip[download it here]. (Optionally, use any OgreXML scene of your own.) For this sample, place the zip file in the application's top level directory (that is, next to src/, assets/, build.xml).
+The file `town.zip` is included as a sample model in the JME3 sources – you can link:https://wiki.jmonkeyengine.org/Scenes/Town/town.zip[Download the town.zip]. (Optionally, use any OgreXML scene of your own.) For this sample, place the zip file in the application's top level directory (that is, next to src/, assets/, build.xml).
 
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