[data/C/books-and-ebooks/0002-fedora-defensive-coding.json] date field isn't applied from the JSON file to the README.md

$ grep -r date data/C/books-and-ebooks/0002-fedora-defensive-coding.json 
    "date": "2012",

-      * [Defensive Coding: A Guide to Improving Software Security by the Fedora Security Team](#defensive-coding-a-guide-to-improving-software-security-by-the-fedora-security-team-2018) (2018)
+      * [Defensive Coding: A Guide to Improving Software Security by the Fedora Security Team](#defensive-coding-a-guide-to-improving-software-security-by-the-fedora-security-team-2019) (2019)

        if (!empty($fd['date'])) {
            $dt = new \DateTime($fd['date']);
            $header .= ' ('.$dt->format('Y').')';
        }