Improve documentation for __html (#6499)

Author: Daniel15

src/content/reference/react-dom/components/common.md

@@ -982,6 +982,8 @@ textarea { display: block; margin-top: 5px; margin-bottom: 10px; }
 
 </Sandpack>
 
+The `{__html}` object should be created as close to where the HTML is generated as possible, like the above example does in the `renderMarkdownToHTML` function. This ensures that all raw HTML being used in your code is explicitly marked as such, and that only variables that you expect to contain HTML are passed to `dangerouslySetInnerHTML`. It is not recommended to create the object inline like `<div dangerouslySetInnerHTML={{__html: markup}} />`.
+
 To see why rendering arbitrary HTML is dangerous, replace the code above with this:
 
 ```js {1-4,7,8}