add copyright notice

.github/workflows/build-and-test.yml

@@ -1,4 +1,14 @@
-# build-and-test.yml
+# Copyright (c) 2010-2024, Lawrence Livermore National Security, LLC. Produced
+# at the Lawrence Livermore National Laboratory. All Rights reserved. See files
+# LICENSE and NOTICE for details. LLNL-CODE-806117.
+#
+# This file is part of the MFEM library. For more information and source code
+# availability visit https://mfem.org.
+#
+# MFEM is free software; you can redistribute it and/or modify it under the
+# terms of the BSD-3 license. We welcome feedback and contributions, see file
+# CONTRIBUTING.md for details.# build-and-test.yml
+
 #
 #  - Builds PyMFEM in three stages:
 #    - MFEM dependencies + MFEM