bpo-43200: Fix link to shutil.copy() in the shutil doc (pythonGH-24505)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

Doc/library/shutil.rst

@@ -443,8 +443,9 @@ Directory and files operations
 Platform-dependent efficient copy operations
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-Starting from Python 3.8 all functions involving a file copy (:func:`copyfile`,
-:func:`copy`, :func:`copy2`, :func:`copytree`, and :func:`move`) may use
+Starting from Python 3.8, all functions involving a file copy
+(:func:`copyfile`, :func:`~shutil.copy`, :func:`copy2`,
+:func:`copytree`, and :func:`move`) may use
 platform-specific "fast-copy" syscalls in order to copy the file more
 efficiently (see :issue:`33671`).
 "fast-copy" means that the copying operation occurs within the kernel, avoiding