[Feature] Update mathbench (#580)

* update xunfei api

* fix lint

* update mathbench to avoid incomplete prediction

configs/datasets/MathBench/mathbench_gen.py

 from mmengine.config import read_base
 
 with read_base():
-    from .mathbench_gen_51000f import mathbench_datasets  # noqa: F401, F403
+    from .mathbench_gen_10da90 import mathbench_datasets  # noqa: F401, F403

configs/datasets/MathBench/mathbench_gen_51000f.py → configs/datasets/MathBench/mathbench_gen_10da90.py

@@ -89,7 +89,7 @@ for _split in list(mathbench_sets.keys()):
                 ice_token="</E>",
             ),
             retriever=dict(type=ZeroRetriever),
-            inferencer=dict(type=GenInferencer),
+            inferencer=dict(type=GenInferencer, max_out_len=512,),
         )
 
         mathbench_eval_cfg = dict(