Update license files to align with repo

No legal ramifications here as CLA signed.

Author: michael-hawker

ColorCode.Core/Compilation/Languages/MatLab.cs

@@ -1,4 +1,6 @@
-// Copyright (c) Microsoft Corporation.  All rights reserved.
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
 
 using System.Collections.Generic;
 using ColorCode.Common;

ColorCode.Core/Compilation/Languages/Python.cs

@@ -1,4 +1,6 @@
-// Copyright (c) Microsoft Corporation.  All rights reserved.
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
 
 using System.Collections.Generic;
 using ColorCode.Common;