fix format

Author: NicoleMGomes

src/sap_cloud_sdk/destination/client.py

@@ -351,7 +351,9 @@ def get_destination(
                 if options.fragment_name:
                     headers["X-fragment-name"] = options.fragment_name
                 if options.fragment_optional is not None:
-                    headers["X-fragment-optional"] = str(options.fragment_optional).lower()
+                    headers["X-fragment-optional"] = str(
+                        options.fragment_optional
+                    ).lower()
                 if options.tenant:
                     headers["X-tenant"] = options.tenant
                 if options.user_token: