bug#34307: Remind to refresh directory if hardlinks were affected

["積丹尼 Dan Jacobson" <jidanni@jidanni.org>]

On


   R runs the command dired-do-rename (found in dired-mode-map), which is
   an interactive autoloaded compiled Lisp function in ‘dired-aux.el’.

   It is bound to R, <menu-bar> <operate> <rename>.

   (dired-do-rename &optional ARG)

   Rename current file or all marked (or next ARG) files.
   When renaming just the current file, you specify the new name.
   When renaming multiple or marked files, you specify a directory.
   This command also renames any buffers that are visiting the files.
   The default suggested for the target directory depends on the value
   of ‘dired-dwim-target’, which see.

Perhaps mention "after renaming files to different filesystems, be sure
to hit "g" to update the hardlink count of any previous hardlinks to
them, that are still remaining in the directory.

Same on the docstring of
    x runs the command dired-do-flagged-delete (found in dired-mode-map),
    which is an interactive compiled Lisp function in ‘dired.el’.