Adjust header (#5863)

Author: DLehenbauer

tools/build-tools/src/repoPolicyCheck/handlers/copyrightFileHeader.ts

@@ -10,7 +10,7 @@ import {
   writeFile,
 } from "../common";
 
-const copyrightText = "Copyright (c) Microsoft Corporation. All rights reserved." + newline + "Licensed under the MIT License.";
+const copyrightText = "Copyright (c) Microsoft Corporation and contributors. All rights reserved." + newline + "Licensed under the MIT License.";
 const autoGenText = newline + "THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY";
 
 interface IFileConfig {

tools/build-tools/src/repoPolicyCheck/handlers/npmPackages.ts

@@ -16,7 +16,7 @@ import {
 const PJV = require("package-json-validator").PJV;
 
 const licenseId = 'MIT';
-const author = 'Microsoft';
+const author = 'Microsoft and contributors';
 const repository = 'https://github.com/microsoft/FluidFramework';
 const homepage = 'https://fluidframework.com';
 const trademark = `