fix typo in french translation (#213)

Lionel Brianto

10.48.2019 02630ed83cf3c8bb193272bf34188c0892ebc2f2

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<li>
  <span class="date">{{ .Date.Format (.Site.Params.dateFormat | default "January 2, 2006" ) }}</span>
  <a class="title" href="{{ .Params.ExternalLink | default .RelPermalink }}">{{ .Title }}</a>
</li>