Update CHANGELOG.md for Azure.Sdk.Tools.Cli version 0.5.5 (#12681)

* Update CHANGELOG.md for version 0.5.5 release

Author: Copilot

tools/azsdk-cli/Azure.Sdk.Tools.Cli/CHANGELOG.md

@@ -1,16 +1,16 @@
 # Release History
 
-## 0.5.5 (Unreleased)
+## 0.5.5 (2025-10-28)
 
 ### Features Added
 
 - Add support for generating samples for Azure client libraries across all languages
-
-### Breaking Changes
+- Add tool status in response
+- Disable telemetry in debug mode.
 
 ### Bugs Fixed
 
-### Other Changes
+- Fixed issue when linking .NET PR to release plan
 
 ## 0.5.4 (2025-10-21)