docs: prepare changelog for release 5.1.1

Author: Pennati, Lucas

docs/changelog.md

@@ -8,8 +8,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ### Added
 
-- Added `hoverContent` prop to `six-tab` to override the default hover content.
-
 ### Fixed
 
 ### Removed
@@ -18,6 +16,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ### Deprecated
 
+## 5.1.1 - 2025-11-04
+
+### Added
+
+- Added `hoverContent` prop to `six-tab` to override the default hover content.
+
 ## 5.1.0 - 2025-10-23
 
 ### Added