docs: update README.md with a hint about the layout discussion

Patrick Kollitsch

8 days ago 0cb0c552290ca8eb6236877d1f13a599e0a606a5

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{{ $url := site.Params.commentoPath | compare.Default "https://cdn.commento.io/js/commento.js" }}
<div id="commento"></div>
<script defer src="{{- $url -}}"></script>