Update label.adoc

Fixed broken horizontal rule.

src/docs/asciidoc/jme3/contributions/tonegodgui/label.adoc

@@ -14,6 +14,7 @@ Though there was no real need for providing a Label class, as the Element class
 
 NOTE:
 Style information can be overridden by any instance by using the Text/Font setters provided by the Element class
+
 '''