Add changelog section for v2.0.560 [skip ci]

Author: PEZ

CHANGELOG.md

@@ -4,6 +4,8 @@ Changes to Calva.
 
 ## [Unreleased]
 
+## [2.0.560] - 2026-02-21
+
 - Add: [Structural comment toggle using #_ as default](https://github.com/BetterThanTomorrow/calva/issues/3086). Controlled by the `calva.paredit.toggleCommentBehavior` setting (`ignoreParentForm`, `ignoreCurrentForm`, or `commentCurrentLine`)
 
 ## [2.0.559] - 2026-02-20