chore: MessageBird update (#792)

* chore: messagebird callout and link updates

* chore: format

* fix: spacing

Author: cellomatt

content/integrations/sms/messagebird.mdx

@@ -5,7 +5,33 @@ section: Integrations > SMS
 layout: integrations
 ---
 
-Knock integrates with <a href="https://messagebird.com/" target="_blank">MessageBird</a> to send SMS notifications to your recipients.
+Knock integrates with <a href="https://developers.messagebird.com/api/sms-messaging/" target="_blank">MessageBird</a> to send SMS notifications to your recipients.
+
+<Callout
+  emoji="⚠️"
+  text={
+    <>
+      <span className="font-bold">Note:</span> On February 1, 2024,{" "}
+      <a
+        href="https://bird.com/en-us/blog/messagebird-is-now-bird"
+        target="_blank"
+      >
+        MessageBird announced a rebrand as Bird
+      </a>
+      , along with the introduction of a Bird CRM product and new APIs for sending
+      messages. <br /> <br /> This integration is with the <a
+        href="https://developers.messagebird.com/api/sms-messaging/"
+        target="_blank"
+      >
+        legacy MessageBird SMS API
+      </a>, which continues to be supported by Bird but is no longer accepting new
+      customers. If integrating with the new Bird API is a blocker to your Knock
+      integration, please reach out to <a href="mailto:[email protected]?subject=Bird%20API%20integration">
+        [email protected]
+      </a> to let us know.
+    </>
+  }
+/>
 
 ## Features