Update lib/msal-node/README.md
Update lib/msal-node/README.md

Co-authored-by: Jason Nutter <1f1397791ea0449e513abc40fb18d66425c9a4e7@microsoft.com>
AzureAD/microsoft-authentication-library-for-js,AzureAD/microsoft-authentication-library-for-js,AzureAD/microsoft-authentication-library-for-js,AzureAD/microsoft-authentication-library-for-js,AzureAD/microsoft-authentication-library-for-js,AzureAD/microsoft-authentication-library-for-js,AzureAD/microsoft-authentication-library-for-js,AzureAD/microsoft-authentication-library-for-js