Fix lint error and bump version

Author: awalker4

gen.yaml

@@ -10,7 +10,7 @@ generation:
   auth:
     oAuth2ClientCredentialsEnabled: false
 python:
-  version: 0.26.0
+  version: 0.26.1
   additionalDependencies:
     dev:
       deepdiff: '>=6.0'

src/unstructured_client/_hooks/custom/split_pdf_hook.py

@@ -105,6 +105,7 @@ class SplitPdfHook(SDKInitHook, BeforeRequestHook, AfterSuccessHook, AfterErrorH
 
     def __init__(self) -> None:
         self.client: Optional[HttpClient] = None
+        self.base_url: Optional[str] = None
         self.async_client: Optional[AsyncHttpClient] = None
         self.coroutines_to_execute: dict[
             str, list[Coroutine[Any, Any, httpx.Response]]