Create links to referenced embedded templates

Closes #2370

content/en/render-hooks/code-blocks.md

@@ -133,3 +133,10 @@ Then include this snippet at the bottom of the your base template:
 See the [diagrams] page for details.
 
 [diagrams]: /content-management/diagrams/#mermaid-diagrams
+
+## Embedded
+
+Hugo includes an [embedded code block render hook]({{% eturl render-image %}}) to render [GoAT diagrams].
+
+[embedded code block render hook]: {{% eturl render-codeblock-goat %}}
+[GoAT diagrams]: /content-management/diagrams/#goat-diagrams-ascii