fix(core): TRAC-275 align formField.required with field.required for checkbox-group

.changeset/fix-checkbox-group-required.md

@@ -0,0 +1,6 @@
+---
+"@bigcommerce/catalyst-core": patch
+---
+
+Fix `formField.required` mismatch for `checkbox-group` fields in `DynamicForm`. The schema branch was missing `.optional()` for non-required checkbox groups.
+

core/vibes/soul/form/dynamic-form/schema.ts

@@ -300,9 +300,8 @@ function getFieldSchema(
       break;
 
     case 'checkbox-group':
-      fieldSchema = z.string().array();
-
-      if (field.required === true) fieldSchema = fieldSchema.nonempty();
+      fieldSchema =
+        field.required === true ? z.string().array().nonempty() : z.string().array().optional();
 
       break;