Adds `rel` parameter to the social icons configuration documentation (#987)

Alexander Lazarević

3 days ago eea6dfd3fe4b97518d2c5d2fb550e906793507e8

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{{ if not .Site.Params.hideColorSchemeToggle }}
<div class="float-container">
    <a id="dark-mode-toggle" class="colorscheme-toggle">
        <i class="fa-solid fa-adjust fa-fw" aria-hidden="true"></i>
    </a>
</div>
{{ end }}