erp5_api_style: Error message provide full url of the error message schema

bt5/erp5_api_style/SkinTemplateItem/portal_skins/erp5_api_style/ERP5Site_logApiErrorAndReturn.py

@@ -11,7 +11,7 @@ container.REQUEST.RESPONSE.setStatus(400)
 # We follow here Paypal api guideline
 # https://github.com/paypal/api-standards/blob/master/api-style-guide.md#error-schema
 error_dict = {
-  "$schema": "error-response-schema.json",
+  "$schema": context.absolute_url().strip("/") + "/error-response-schema.json",
   "debug_id": error.getId(),
   "status": error_code,
   "message": error_message