package/jpeg-turbo: bump to version 3.1.2

License hash changed due to year update:
https://github.com/libjpeg-turbo/libjpeg-turbo/commit/f2d1f1cbd431b5b5e3c0c354bddbf8360cdcabd1

Release notes:
https://github.com/libjpeg-turbo/libjpeg-turbo/releases/tag/3.1.1
https://github.com/libjpeg-turbo/libjpeg-turbo/releases/tag/3.1.2



Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>