fix(sdk): better enum doc and behaviour

Author: NaejDoree

engine/modules/entities/src/main/java/com/codingame/gameengine/module/entities/Text.java

@@ -8,14 +8,14 @@
 public class Text extends TextureBasedEntity<Text> {
 
     /**
-     * The list of supported font weight.
+     * The list of supported font weights.
      * 
      */
     public static enum FontWeight {
         NORMAL, BOLD, BOLDER, LIGHTER;
 
         public String toString() {
-            return super.toString().toLowerCase();
+            return name().toLowerCase();
         }
     }