Update hello_node.adoc

Set Rotations turns Spatial table column widths to 55,15,15,15 to make more readable.

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

@@ -349,7 +349,7 @@ a|height
 a|width
 
 |===
-[cols="4", options="header"]
+[cols="55,15,15,15", options="header"]
 |===
 
 a| Rotation turns Spatials