Doc changes (#1253)

* num classes specified was wrong

* wrong num_classes specified

---------

Co-authored-by: Ofri Masad <ofrimasad@users.noreply.github.com>
Co-authored-by: Eugene Khvedchenya <ekhvedchenya@gmail.com>

documentation/source/qat_ptq_yolo_nas.md

@@ -174,8 +174,8 @@ from super_gradients.common.object_names import Models
 from super_gradients.training import models
 
 model = models.get(Models.YOLO_NAS_S,
-                   checkpoint_path=<YOUR_CHECKPOINTS_ROOT_DIRECTORY>/yolo_nas_s_soccer_players/ckpt_best.pth>,
-                   num_classes=4)
+                  checkpoint_path=<YOUR_CHECKPOINTS_ROOT_DIRECTORY>/yolo_nas_s_soccer_players/ckpt_best.pth>,
+                  num_classes=3)
 predictions = model.predict("messi_penalty.mp4")
 predictions.show(show_confidence=False)
 ```