Update hello_asset.adoc

Set HttpZipLocator url to raw file for wildhouse.zip.

src/docs/asciidoc/jme3/beginner/hello_asset.adoc

@@ -217,7 +217,7 @@ Here is a HttpZipLocator that can download zipped models and load them:
 ----
 
     assetManager.registerLocator(
-      "https://github.com/jMonkeyEngine/wiki/blob/master/src/docs/resources/Scenes/wildhouse.zip", 
+      "https://github.com/jMonkeyEngine/wiki/raw/master/src/docs/resources/Scenes/wildhouse.zip", 
       HttpZipLocator.class);
     Spatial scene = assetManager.loadModel("main.scene");
     rootNode.attachChild(scene);