Update frontend_utils.py

Fix typo

cosyvoice/utils/frontend_utils.py

@@ -86,7 +86,7 @@ def split_paragraph(text: str, tokenize, lang="zh", token_max_n=80, token_min_n=
             text += "。"
         else:
             text += "."
-    
+ 
     st = 0
     utts = []
     for i, c in enumerate(text):