Fix broken links in autorevert.el

* lisp/autorevert.el (global-auto-revert-non-file-buffers):
Fix broken links.  (Bug#47621)
2 jobs for emacs-27 in 98 minutes and 49 seconds (queued for 6 seconds)
Status Job ID Name Coverage
  Test
passed #16461
test-all

01:38:49

passed #16462
test-filenotify-gio

00:43:35