docs/zh_TW+zh_CN: Make rst references unique

We found that sphinx parallel processing would randomly pick
one or the other
https://github.com/sphinx-doc/sphinx/issues/6714#issuecomment-2362212754



Signed-off-by: Bernhard M. Wiedemann <bwiedemann@suse.de>
Reviewed-by: Yanteng Si <siyanteng@linux.dev>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20240920070144.26947-1-bernhard+linux-doc@lsmod.de