Add StatusAttributeString to CreditNote

Author: SidneyAllen

accounting-yaml/xero_accounting.yaml

@@ -18940,6 +18940,9 @@ components:
           description: See BrandingThemes
           type: string
           format: uuid
+        StatusAttributeString:
+          description: A string to indicate if a invoice status
+          type: string
         HasAttachments:
           description: boolean to indicate if a credit note has an attachment
           type: boolean