Update changelog

CHANGELOG.md

 
+<a name="v3.39.0"></a>
+## [v3.39.0] - 2023-04-03
+### Add Features
+- monitoring attribute change
+
+
 <a name="v3.38.1"></a>
 ## [v3.38.1] - 2023-04-03
 ### Bug Fixes
@@ -545,6 +551,7 @@
 <a name="1.8.0"></a>
 ## 1.8.0 - 2021-08-15
 
+[v3.39.0]: https://gitlab.schukai.com/oss/libraries/javascript/monster/compare/v3.38.1...v3.39.0
 [v3.38.1]: https://gitlab.schukai.com/oss/libraries/javascript/monster/compare/v3.38.0...v3.38.1
 [v3.38.0]: https://gitlab.schukai.com/oss/libraries/javascript/monster/compare/v3.37.0...v3.38.0
 [v3.37.0]: https://gitlab.schukai.com/oss/libraries/javascript/monster/compare/v3.36.0...v3.37.0