/usr/share/doc/libgphoto2-6/libgphoto2-api.html/jquery.js is in libgphoto2-dev-doc 2.5.3.1-1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgphoto2-6/libgphoto2-api.html/../../../javascript/jquery/jquery.js