chore: add changelog entry to 1.7 changelog

Author: mcanouil

news/changelog-1.7.md

@@ -12,6 +12,7 @@ All changes included in 1.7:
 ## YAML validation
 
 - ([#11654](https://github.com/quarto-dev/quarto-cli/issues/11654)): Allow `page-inset` as value in `column` key for code cells.
+- ([#10251](https://github.com/quarto-dev/quarto-cli/issues/10251)): EJS template for website now uses proper object to get alt text for logo in sidebar.
 
 ## Website projects