package/luarocks: bump to version 3.12.2
For change log, see:
https://github.com/luarocks/luarocks/blob/v3.12.2/CHANGELOG.md
Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
[Julien: add link to change log]
Signed-off-by: Julien Olivain <ju.o@free.fr>