fix det_v3 (#10180)

configs/det/ch_PP-OCRv3/ch_PP-OCRv3_det_cml.yml

@@ -18,6 +18,7 @@ Global:
   save_res_path: ./checkpoints/det_db/predicts_db.txt
   distributed: true
   d2s_train_image_shape: [3, -1, -1]
+  amp_dtype: bfloat16
 
 Architecture:
   name: DistillationModel
@@ -222,4 +223,4 @@ Eval:
     shuffle: False
     drop_last: False
     batch_size_per_card: 1 # must be 1
-    num_workers: 2
\ No newline at end of file
+    num_workers: 2