fix(python): update flow complete test, input with defaults are now required

Author: Skraye

python/python-sdk/testApis/test_flows_api.py

@@ -84,7 +84,7 @@ def test_create_complete_flow(self) -> None:
 inputs:
   - id: user
     type: STRING
-    required: false
+    required: true
     defaults: Kestrel
     description: This is an optional input — if not set at runtime, it will use the default value Kestrel