make comment more informative

Author: hx2A

py5_jar/src/main/java/py5/core/Sketch.java

@@ -261,7 +261,7 @@ public void draw() {
     }
 
     if (frameCount == 1 && platform == LINUX && g.isGL()) {
-      // Linux and OpenGL need to capture pixels after the last draw() call
+      // Linux with KDE Plasma window manager and OpenGL need to capture pixels after the last draw() call
       capturePixels();
     }
   }