erp5_api_style: when no document is found, return 404 error

bt5/erp5_api_style/SkinTemplateItem/portal_skins/erp5_api_style/ERP5Site_asjIOStyle.py

@@ -87,7 +87,11 @@ if mode in ("get", "put"):
     else:
       document = context.jIOWebSection_getObjectFromData(data)
       if document is None:
-        return logError("The data you provided did not allow to find the corresponding document", error_name="API-JSON-DOCUMENT-NOT-FOUND")
+        return logError(
+          "The data you provided did not allow to find the corresponding document",
+          error_name="API-JSON-DOCUMENT-NOT-FOUND",
+          error_code=404,
+        )
 else:
   document = context