chore(zeebe/CHANGELOG): update to v0.28.0

Author: Buckwich

packages/zeebe-element-templates-json-schema/CHANGELOG.md

@@ -6,6 +6,10 @@ All notable changes to [@camunda/zeebe-element-templates-json-schema](https://gi
 
 ___Note:__ Yet to be released changes appear here._
 
+## 0.28.0
+
+* `FEAT`: support `zeebe:priorityDefinition` ([#188](https://github.com/camunda/element-templates-json-schema/pull/188))
+
 ## 0.27.0
 
 * `FEAT`: support `zeebe:assignmentDefinition` ([#186](https://github.com/camunda/element-templates-json-schema/pull/186))