Fix multiprocessing bert_gen error of pyopenjtalk_worker

infer.py

@@ -1,10 +1,11 @@
 import torch
 
 import commons
+from text.get_bert import get_bert
 import utils
 from models import SynthesizerTrn
 from models_jp_extra import SynthesizerTrn as SynthesizerTrnJPExtra
-from text import cleaned_text_to_sequence, get_bert
+from text import cleaned_text_to_sequence
 from text.cleaner import clean_text
 from text.symbols import symbols
 from common.log import logger