feat: rename author variable name

Felix Boerner

23.46.2018 9b3f131a8de82125f6f577fb40e7df4443dcabcf

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<div class="split-intro">
  <h1>{{ .Site.Params.content.name }}</h1>
  <span class="tagline">{{ .Site.Params.content.tagline }}</span>
</div>