add copyright

Signed-off-by: ruit <ruit@nvidia.com>

Author: RayenTian

examples/converters/convert_lora_to_hf.py

@@ -1,3 +1,18 @@
+# Copyright (c) 2026, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 """Export a Megatron LoRA adapter checkpoint to HuggingFace format.
 
 This script supports two workflows: