Update hello_terrain.adoc

Moved image mountain512.png to align with the text calling attention to it.

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

@@ -154,8 +154,6 @@ In a real game, you will want to use more complex and smoother terrains than the
 
 === Looking at the Heightmap Code
 
-[.right.text-left]
-image::jme3/beginner/mountains512.png[mountains512.png,128,128,align="right"]
 
 
 The first step of terrain creation is the heightmap. You can create one yourself in any standard graphic application. Make sure it has the following properties:
@@ -168,6 +166,9 @@ The first step of terrain creation is the heightmap. You can create one yourself
 
 *  Save the map as a .jpg or .png image file
 
+[.right.text-left]
+image::jme3/beginner/mountains512.png[mountains512.png,128,128,align="right"]
+
 The file `mountains512.png` that you see here is a typical example of an image heightmap.
 
 Here is how you create the heightmap object in your jME code: