Update copyright header to match LCA guidelines

Author: Immo Landwerth

src/Microsoft.DotNet.CodeFormatting/Rules/HasCopyrightHeaderFormattingRule.cs

@@ -17,8 +17,11 @@ internal sealed class HasCopyrightHeaderFormattingRule : IFormattingRule
     {
         static readonly string[] CopyrightHeader =
         {
-            "// Copyright (c) Microsoft Corporation. All rights reserved.",
-            "// Licensed under MIT. See LICENSE in the project root for license information."
+            "// Copyright (c) Microsoft. All rights reserved.",
+            "// This code is licensed under the MIT License.",
+            "// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR",
+            "// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,",
+            "// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT."
         };
 
         public async Task<Document> ProcessAsync(Document document, CancellationToken cancellationToken)