layouts/shortcodes/about/testimonials.html

{{ $testimonials := site.Data.testimonials -}}
<div class="row c-testimonials">
{{- range $testimonials -}}
  {{ $img   := printf "imgs/user/logo/%s" .image | relURL -}}
  {{ $quote := .quote | markdownify -}}
  <div class="col-12 col-sm-6 col-lg-2 c-testimonials__testimonial">
    <a href="{{ .link }}" target="_blank" rel="noopener">
      <img class="used-by-logo" src="{{ $img }}" alt="{{ .name }} testimonial logo">
    </a>
  </div>
{{ end -}}
</div>