Update docs on markdown filter

Closes #989

docs/content/documentation/templates/overview.md

@@ -72,6 +72,8 @@ pass `true` to the inline argument:
 {{ some_text | markdown(inline=true) }}
 ```
 
+You do not need to use this filter with `page.content` or `section.content`, the content is already rendered.
+
 ### base64_encode
 Encode the variable to base64.
 

docs/content/documentation/templates/pages-sections.md

@@ -14,6 +14,7 @@ with the following fields:
 
 
 ```ts
+// The HTML output of the Markdown content
 content: String;
 title: String?;
 description: String?;
@@ -68,6 +69,7 @@ with the following fields:
 
 
 ```ts
+// The HTML output of the Markdown content
 content: String;
 title: String?;
 description: String?;