/usr/lib/x86_64-linux-gnu/libenchant.so is in libenchant-dev 1.6.0-10ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libenchant.so.1.6.0
/usr/lib/x86_64-linux-gnu/libenchant.so.1.6.0