fix: avoid line break for <figure> element

Author: razonyang

layouts/partials/images/figure.html

@@ -1,6 +1,4 @@
-<figure
-  class="{{ .figureClass }} {{ .wrapperClass }}"
-  {{ range .attrs }}{{ . | safeHTMLAttr }}{{ end }}>
+<figure class="{{ .figureClass }} {{ .wrapperClass }}" {{ range .attrs }}{{ . | safeHTMLAttr }}{{ end }}>
   {{ partial "images/picture" (merge .ctx (dict "className" (printf "%s %s" .figureImgClass .className))) }}
   <figcaption class="{{ .figureCaptionClass }}">{{ .ctx.caption }}</figcaption>
 </figure>