Issue #3468025 by G4MBINI: Use proper type for props in component YML definitions

Closes #3468025

components/collapse/collapse.component.yml

@@ -48,7 +48,7 @@ props:
     accordion_id:
       title: "Accordion ID"
       description: "To fill for collapse used inside an Accordion component."
-      $ref: "ui-patterns://string"
+      $ref: "ui-patterns://machine_name"
     checked:
       title: "Checked?"
       description: "To set to true for a collapse used inside an Accordion component."