chore(CHANGELOG): update to v2.10.0

Author: Buckwich

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to [element-templates-validator](https://github.com/bpmn-io/
 
 ## Unreleased
 
+___Note:__ Yet to be released changes appear here._
+
+## 2.10.0
+
 * `FEAT`: support `zeebe:priorityDefinition` binding ([#64](https://github.com/bpmn-io/element-templates-validator/pull/64))
 * `DEPS`: update to `@camunda/[email protected]`