bpo-42955: Fix sys.module_names doc (GH-24329)

vstinner · web-flow · commit 483359174e92 · 2021-01-25T13:59:02.000+01:00
Replace versionchanged markup with versionadded.
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
@@ -1077,7 +1077,7 @@ always available.
 
    See also the :attr:`sys.builtin_module_names` list.
 
-   .. versionchanged:: 3.10
+   .. versionadded:: 3.10
 
 
 .. data:: modules
