Update app.py

app.py

@@ -162,7 +162,7 @@ def convert_openai_to_reka(messages: list[dict]) -> list[dict]:
 
 def format_part(current_text: str, previous_text: str, finish_reason: str):
     logger.debug(f'форматирование сообщения: {current_text}')
-    return f"data: {dumps({
+    return f"{dumps({
         'id': 'chatcmpl-0',
         'object': 'chat.completion.chunk',
         'created': int(datetime.now().timestamp()),