Applied black formatter to sample guide file

Signed-off-by: Djcarrillo6 <[email protected]>

samples/document_lifecycle/document_lifecycle_sample.py

@@ -1,3 +1,15 @@
+#!/usr/bin/env python
+
+# -*- coding: utf-8 -*-
+# SPDX-License-Identifier: Apache-2.0
+#
+# The OpenSearch Contributors require contributions made to
+# this file be licensed under the Apache-2.0 license or a
+# compatible open source license.
+#
+# Modifications Copyright OpenSearch Contributors. See
+# GitHub history for details.
+
 from opensearchpy import OpenSearch
 
 # For cleaner output, comment in the two lines below to disable warnings and informational messages