chore: change section name in changelog

Author: mcanouil

news/changelog-1.9.md

@@ -68,9 +68,9 @@ 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)
 
-## Lua Filters and extensions
+## Quarto Lua API
 
-- Add `quarto.paths.typst()` to Quarto's Lua API to resolve Typst binary path in Lua filters and extensions consistently with Quarto itself.
+- 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)
 
 ## Other fixes and improvements