Update backend.py

backend.py

@@ -10,7 +10,7 @@ os.environ["GOOGLE_API_KEY"]="AIzaSyC8W6-q0Db2200MDE3LpsVZPrkzXZUUuW0"
 
 class InvoicePipeline:
 
-    def __init__(self, paths:List[str]):
+    def __init__(self, paths):
         self._paths = paths
         self ._llm = GoogleGenerativeAI(model="gemini-1.5-pro", google_api_key=api_key)
         self._prompt_template = self._get_default_prompt_template()