Update file header

Signed-off-by: Victor Chang <vicchang@nvidia.com>

src/Authentication/Tests/Monai.Deploy.Security.Authentication.Tests.csproj

@@ -1,3 +1,18 @@
+<!--
+  ~ Copyright 2022 MONAI Consortium
+  ~
+  ~ 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.
+-->
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>