Add to changelog

Author: cderv

news/changelog-1.5.md

@@ -6,6 +6,7 @@ All changes included in 1.5:
 - ([#8118](https://github.com/quarto-dev/quarto-cli/issues/8118)): Add support for `body-classes` to add classes to the document body.
 - ([#8311](https://github.com/quarto-dev/quarto-cli/issues/8311)): Correct z-order for margins with no contents
 - ([#8862](https://github.com/quarto-dev/quarto-cli/issues/8862)): Properly deal with an `aside` within a definition list.
+- ([#8990](https://github.com/quarto-dev/quarto-cli/issues/8990)): Copy button now works for embedded code source in modal window when optin-in `code-tools` feature.
 
 ## PDF Format