/usr/share/doc/libkf5gapi-dev/changelog.Debian.gz is in libkf5gapi-dev 5.1.0-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libkf5gapi-dev/../libkf5gapiblogger5/changelog.Debian.gz