Update custom-formats.yml

Update description of `quarto-preprint` extension.

(cherry picked from commit 4513e4d)

Author: mvuorre

docs/extensions/listings/custom-formats.yml

@@ -90,7 +90,7 @@
   path: https://github.com/mvuorre/quarto-preprint
   author: '[Matti Vuorre](https://github.com/mvuorre)'
   description: >
-    A clean but opinionated Typst format for preprint submissions. Also includes a minimal MS Word format.
+    A clean & opinionated Typst (PDF) format with improved support for Typst functionality beyond Quarto's standard template.
 
 - name: sketchy-html
   path: https://github.com/schochastics/quarto-sketchy-html