feat:修改sdp backend为math

fish_speech/models/text2semantic/inference.py

@@ -308,7 +308,7 @@ def decode_n_tokens(
 
     for i in tqdm(range(num_new_tokens)):
         f_start = time.perf_counter()
-        with sdpa_kernel(SDPBackend.EFFICIENT_ATTENTION):
+        with sdpa_kernel(SDPBackend.MATH):
             next_token = decode_one_token(
                 model=model,
                 x=cur_token,