Update maintenance mode message (#4676)

Author: trivikr

.changes/next-release/feature-Support-4fb4c97e.json

@@ -0,0 +1,5 @@
+{
+  "type": "feature",
+  "category": "Support",
+  "description": "Update maintenance mode message to indicate it has entered maintenance mode"
+}

lib/maintenance_mode_message.js

@@ -1,8 +1,8 @@
 var warning = [
-  'The AWS SDK for JavaScript (v2) will enter maintenance mode',
-  'on September 8, 2024 and reach end-of-support on September 8, 2025.\n',
+  'The AWS SDK for JavaScript (v2) is in maintenance mode.',
+  ' SDK releases are limited to address critical bug fixes and security issues only.\n',
   'Please migrate your code to use AWS SDK for JavaScript (v3).',
-  'For more information, check blog post at https://a.co/cUPnyil'
+  'For more information, check the blog post at https://a.co/cUPnyil'
 ].join('\n');
 
 module.exports = {