fix postprocess_batch method in RTMO_GPU_Batch class

rtmo_gpu.py

@@ -547,8 +547,10 @@ class RTMO_GPU_Batch(RTMO_GPU):
         batch_keypoints = []
         batch_scores = []
 
+        b_dets, b_keypoints = outputs
         for i, ratio in enumerate(ratios):
-            keypoints, scores = super().postprocess(outputs, ratio)
+            output = [np.expand_dims(b_dets[i], axis=0), np.expand_dims(b_keypoints[i],axis=0)]
+            keypoints, scores = super().postprocess(output, ratio)
             batch_keypoints.append(keypoints)
             batch_scores.append(scores)