/usr/share/doc/python-certbot-nginx-doc/html/_static/fonts/fontawesome-webfont.woff is in python-certbot-nginx-doc 0.28.0-1~deb9u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python-certbot-nginx-doc/html/_static/fonts/../../../../../sphinx_rtd_theme/static/fonts/fontawesome-webfont.woff