/usr/share/doc/libgstreamerd-3-0/changelog.Debian.gz is in libgstreamerd-3-0 3.7.5-2build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgstreamerd-3-0/../libgtkd-3-0/changelog.Debian.gz