chore: update use-case & license year (#1392)

* chore: update use-case

* update LICENSE year

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (C) 2023, Twilio SendGrid, Inc. <help@twilio.com>
+Copyright (C) 2024, Twilio SendGrid, Inc. <help@twilio.com>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in

docs/use-cases/data-residency-set-hostname.md

@@ -4,29 +4,33 @@ Use the `setDataResidency` setter to specify which host to send to:
 
 Send to EU (data-residency: `https://api.eu.sendgrid.com/`)
 ```js
+const client = require('@sendgrid/client');
 const sgMail = require('@sendgrid/mail');
-sgMail.setDataResidency('eu');
+client.setDataResidency('eu');
 const msg = {
   to: 'recipient@example.org',
   from: 'sender@example.org',
   subject: 'Hello world',
   text: 'Hello plain world!',
   html: '<p>Hello HTML world!</p>',
 };
+sgMail.setClient(client);
 sgMail.send(msg);
 ```
 Send to Global region, this is also the default host, if the setter is not used
 (data-residency: `https://api.sendgrid.com/`)
 ```js
+const client = require('@sendgrid/client');
 const sgMail = require('@sendgrid/mail');
-sgMail.setDataResidency('global');
+client.setDataResidency('global');
 const msg = {
   to: 'recipient@example.org',
   from: 'sender@example.org',
   subject: 'Hello world',
   text: 'Hello plain world!',
   html: '<p>Hello HTML world!</p>',
 };
+sgMail.setClient(client);
 sgMail.send(msg);
 ```