fix: correct parameter name from 'seperator' to 'separator' in ChunkedPromptedGenerator (#498)

Author: dragonfrank666

dataflow/operators/core_text/generate/chunked_prompted_generator.py

@@ -25,15 +25,15 @@ def __init__(
         json_schema: dict = None,
         max_chunk_len: int = 128000,
         enc = tiktoken.get_encoding("cl100k_base"), # 支持len(enc.encode(text))的tokenizer都可以，比如tiktoken或HuggingFace的AutoTokenizer
-        seperator: str = "\n",
+        separator: str = "\n",
     ):
         self.logger = get_logger()
         self.llm_serving = llm_serving
         self.system_prompt = system_prompt
         self.json_schema = json_schema
         self.max_chunk_len = max_chunk_len
         self.enc = enc
-        self.separator = seperator
+        self.separator = separator
 
     @staticmethod
     def get_desc(lang: str = "zh"):