/usr/share/doc/libpjproject-dev/changelog.Debian.gz is in libpjproject-dev 2.7.2~dfsg-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libpjproject-dev/../libpj2/changelog.Debian.gz
/usr/share/doc/libpjproject-dev/../libpj2/changelog.Debian.gz