updated changelog

Author: shajason

source/instructors/getstarted/support/changelog.rst

@@ -13,6 +13,10 @@ We do not report small bug fixes or issues that affect individual users, who we
 `[I]` = Update or improvement
 `[F]` = New feature
 
+**July 2025**
+
+- `[F] [7th]`: The Codio dashboard has been updated.
+
 **June 2025**
 
 - `[F] [2nd]`: Add Ability to :ref:`Export all course management activity data <course-action-data>`