docs: update|javadoc

Author: JNightRider

jme3-lwjgl3/src/main/java/com/jme3/system/lwjgl/LwjglCanvas.java

@@ -101,7 +101,8 @@
  * <pre><code>
  * ....
  *  AppSettings settings = new AppSettings(true);
- *  settings.setGammaCorrection(false);
+ *  settings.setGammaCorrection(true);
+ *  settings.setRenderer(AppSettings.LWJGL_OPENGL32);
  * ...
  * </code></pre>
  *