use heading render hook instead of refactor

layouts/_default/_markup/render-heading.html

@@ -0,0 +1,8 @@
+<h{{ .Level }} id="{{ .Anchor }}" {{- range $key, $value := .Attributes }} {{- printf " %s=%v" $key $value | safeHTMLAttr }}{{- end }}>
+  {{ if and (ne .Level 1) (not (index .Attributes "data-toc-skip")) }}
+    <span class="me-2">{{- .Text -}}</span>
+    <a href="#{{ .Anchor }}" class="anchor text-muted"><i class="fas fa-hashtag"></i></a>
+  {{ else }}
+    {{- .Text -}}
+  {{ end }}
+</h{{ .Level }}>