Update changelog

CHANGELOG.md

 
+<a name="v3.31.1"></a>
+## [v3.31.1] - 2023-03-20
+### Bug Fixes
+- check is attribute set
+- ATTRIBUTE_UPDATER_SELECT_THIS and no ATTRIBUTE_UPDATER_ATTRIBUTES fail
+
+
 <a name="v3.31.0"></a>
 ## [v3.31.0] - 2023-03-19
 ### Add Features
@@ -455,6 +462,7 @@
 <a name="1.8.0"></a>
 ## 1.8.0 - 2021-08-15
 
+[v3.31.1]: https://gitlab.schukai.com/oss/libraries/javascript/monster/compare/v3.31.0...v3.31.1
 [v3.31.0]: https://gitlab.schukai.com/oss/libraries/javascript/monster/compare/v3.30.0...v3.31.0
 [v3.30.0]: https://gitlab.schukai.com/oss/libraries/javascript/monster/compare/v3.29.0...v3.30.0
 [v3.29.0]: https://gitlab.schukai.com/oss/libraries/javascript/monster/compare/v3.28.0...v3.29.0