fix: 处理多文档时文件内容提取不正确的问题

Author: liuruibin

apps/application/flow/step_node/document_extract_node/impl/base_document_extract_node.py

@@ -30,7 +30,7 @@ def execute(self, document, **kwargs):
                     buffer.seek(0)
                     file_content = split_handle.get_content(buffer)
                     content += spliter + '## ' + doc['name'] + '\n' + file_content
-                    return NodeResult({'content': content}, {})
+                    break
 
         return NodeResult({'content': content}, {})