docs: update contact us link

Author: Muhamad Ridwan

README.md

@@ -7,7 +7,7 @@
 
 This is a Node.js package that makes talking to the [Sendbird Platform API](https://sendbird.com/docs/chat/v3/platform-api/getting-started/prepare-to-use-api) easier. With this library you can extend your Sendbird integration to include advanced features like channel automation and user management.
 
->__Note__: Platform API SDK v2 includes only the APIs that were actively used in v1. If you need help getting started with the new SDK, [contact us](https://dashboard-dev.sendbird.com/settings/contact_us).
+>__Note__: Platform API SDK v2 includes only the APIs that were actively used in v1. If you need help getting started with the new SDK, [contact us](https://dashboard.sendbird.com/settings/contact_us).
 
 # Install
 ```npm install @sendbird/sendbird-platform-sdk-javascript```