gh-135056: Fix missing renames of extra_response_headers.

Author: aisipos

Doc/library/http.server.rst

@@ -376,7 +376,7 @@ instantiation, of which this module provides three different variants:
       The *directory* parameter accepts a :term:`path-like object`.
 
    .. versionchanged:: next
-      Added *response_headers*.
+      Added *extra_response_headers*.
 
    A lot of the work, such as parsing the request, is done by the base class
    :class:`BaseHTTPRequestHandler`.  This class implements the :func:`do_GET`

Lib/test/test_httpservers.py

@@ -831,7 +831,7 @@ def test_path_without_leading_slash(self):
         self.assertEqual(response.getheader("Location"),
                          self.tempdir_name + "/?hi=1")
 
-    def test_extra_headers_list_dir(self):
+    def test_extra_response_headers_list_dir(self):
         with mock.patch.object(self.request_handler, 'extra_response_headers', new=[
             ('X-Test1', 'test1'),
             ('X-Test2', 'test2'),