Update CHANGELOG

Author: juliasilge

apps/vscode/CHANGELOG.md

@@ -6,6 +6,7 @@
 - Added a new setting `quarto.useBundledQuartoInPositron` to prefer the Quarto CLI bundled with Positron when available. This setting has precedence _between_ `quarto.path` and `quarto.usePipQuarto`, and has no effect outside of Positron (<https://github.com/quarto-dev/quarto/pull/841>).
 - Visual Editor: uses a text box for alternative text and captions in callouts, images, and tables interface. (<https://github.com/quarto-dev/quarto/pull/644>)
 - Fixed a bug where previewing showed "Not Found" on Quarto files with spaces in the name in subfolders of projects (<https://github.com/quarto-dev/quarto/pull/853>).
+- Added support for semantic highlighting in Quarto documents, when using an LSP that supports it (for example, Pylance) (<https://github.com/quarto-dev/quarto/pull/868>).
 
 ## 1.126.0 (Release on 2025-10-08)