fix linter error

leofang · leofang · commit 1083d90dde15 · 2025-10-03T03:39:22.000Z
diff --git a/cuda_core/cuda/core/experimental/_event.pxd b/cuda_core/cuda/core/experimental/_event.pxd
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+#
+# SPDX-License-Identifier: Apache-2.0
+
 from cuda.bindings cimport cydriver
 
 
