Update changelog

Author: vezwork

apps/vscode/CHANGELOG.md

@@ -3,6 +3,7 @@
 ## 1.125.0 (Unreleased)
 
 - Fixed an issue where attribute values containing '='s could be truncated in some scenarios (<https://github.com/quarto-dev/quarto/pull/814>).
+- Fixed an issue where a loading spinner for qmd previews wasn't dismissed on preview errors (<https://github.com/quarto-dev/quarto/pull/823>)
 
 ## 1.124.0 (Release on 2025-08-20)