Update docs/authoring/brand.qmd

Co-authored-by: Charlotte Wickham <charlotte.wickham@posit.co>
(cherry picked from commit 578612c)

Author: gordonwoodhull

docs/authoring/brand.qmd

@@ -384,7 +384,7 @@ It is [not currently possible](https://github.com/quarto-dev/quarto-cli/issues/1
 
 ::: 
 
-The Typst implementation allows [customization of the logo position](../output-formats/typst.qmd#logo-position).
+When using `format: typst` you can additionally [customize the logo position](../output-formats/typst.qmd#logo-position).
 
 ### Typography