Add missing include to resource_ref.hpp (#1677)

This has been found breaking CCCL CI when building cuDF

Authors:
  - Michael Schellenberger Costa (https://github.com/miscco)

Approvers:
  - Lawrence Mitchell (https://github.com/wence-)
  - Mark Harris (https://github.com/harrism)

URL: #1677

Author: miscco

include/rmm/resource_ref.hpp

@@ -15,6 +15,7 @@
  */
 #pragma once
 
+#include <rmm/detail/error.hpp>
 #include <rmm/detail/export.hpp>
 
 #include <cuda/memory_resource>