fix: update DocumentIsPausedError (#11405)

api/tasks/external_document_indexing_task.py

@@ -5,7 +5,7 @@ import time
 import click
 from celery import shared_task
 
-from core.indexing_runner import DocumentIsPausedException
+from core.indexing_runner import DocumentIsPausedError
 from extensions.ext_database import db
 from extensions.ext_storage import storage
 from models.dataset import Dataset, ExternalKnowledgeApis
@@ -86,7 +86,7 @@ def external_document_indexing_task(
                 fg="green",
             )
         )
-    except DocumentIsPausedException as ex:
+    except DocumentIsPausedError as ex:
         logging.info(click.style(str(ex), fg="yellow"))
 
     except Exception: