/usr/lib/x86_64-linux-gnu/libjpeg.so is in libjpeg9-dev 1:9b-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libjpeg.so.9.2.0
/usr/lib/x86_64-linux-gnu/libjpeg.so.9.2.0