chore: drop Quarto from section header

Author: mcanouil

news/changelog-1.9.md

@@ -68,7 +68,7 @@ All changes included in 1.9:
 
 - ([#13414](https://github.com/quarto-dev/quarto-cli/issues/13414)): Be more forgiving when Confluence server returns malformed JSON response. (author: @m1no)
 
-## Quarto Lua API
+## Lua API
 
 - ([#13762](https://github.com/quarto-dev/quarto-cli/issues/13762)): Add `quarto.paths.typst()` to Quarto's Lua API to resolve Typst binary path in Lua filters and extensions consistently with Quarto itself. (author: @mcanouil)