2martens.de/_includes/sidebar/job_offers.html

<div class="card sidebar mb-3">
    <div class="card-body">
        <p class="card-text">
            Job offers:<br>
            <span class="fas fa-envelope"></span>&nbsp;<a href='mailto:{{ site.data.author.job_email }}'>{{ site.data.author.job_email_spam_proof }}</a>
        </p>
    </div>
</div>