Remove code examples for Python 3.8 in `response_change_status_code`

docs/en/docs/advanced/response-change-status-code.md

@@ -20,7 +20,7 @@ You can declare a parameter of type `Response` in your *path operation function*
 
 And then you can set the `status_code` in that *temporal* response object.
 
-{* ../../docs_src/response_change_status_code/tutorial001.py hl[1,9,12] *}
+{* ../../docs_src/response_change_status_code/tutorial001_py39.py hl[1,9,12] *}
 
 And then you can return any object you need, as you normally would (a `dict`, a database model, etc).
 

tests/test_tutorial/test_response_change_status_code/test_tutorial001.py

@@ -1,6 +1,6 @@
 from fastapi.testclient import TestClient
 
-from docs_src.response_change_status_code.tutorial001 import app
+from docs_src.response_change_status_code.tutorial001_py39 import app
 
 client = TestClient(app)