rename gcs file source

Author: praveshkumar1988

backend/src/main.py

@@ -190,7 +190,7 @@ def create_source_node_graph_url(uri, userName, password ,model, source_url=None
                 obj_source_node.file_name = file_metadata['fileName']
                 obj_source_node.file_size = file_metadata['fileSize']
                 obj_source_node.url = file_metadata['url']
-                obj_source_node.file_source = 'GCS'
+                obj_source_node.file_source = 'gcs bucket'
                 obj_source_node.gcs_bucket = gcs_bucket_name
                 obj_source_node.gcs_bucket_folder = gcs_bucket_folder
                 obj_source_node.created_at = datetime.now()