Update validator

[philippfromme]

Proposed Changes

• updates @bpmn-io/element-templates-validator to v2.3.2 to include fix for Boolean input without feel property in a template throws an error camunda/camunda-modeler#4593

Checklist

To ensure you provided everything we need to look at your PR:

• Brief textual description of the changes present
• Visual demo attached
• Steps to try out present, i.e. using the @bpmn-io/sr tool
• Related issue linked via Closes {LINK_TO_ISSUE} or Related to {LINK_TO_ISSUE}