fix(docs): broken link for Postmark API key (#12651)

fixed broken link for Postmark API key

Author: ajey35

docs/pages/getting-started/providers/postmark.mdx

@@ -27,9 +27,9 @@ If someone provides the email address of an _existing account_ when signing in,
 
 ## Configuration
 
-1. First, you'll need to [add your domain](https://postmark.com/domains) to your Postmark account. This is required by Postmark and this domain of the address you use in the `from` provider option.
+1. First, you'll need to [add your domain](https://account.postmarkapp.com/sign_up) to your Postmark account. This is required by Postmark and this domain of the address you use in the `from` provider option.
 
-2. Next, you will have to generate an API key in the [Postmark Dashboard](https://postmark.com/api-keys). You can save this API key as the `AUTH_POSTMARK_KEY` environment variable.
+2. Next, you will have to generate an API key in the [Postmark Dashboard](https://account.postmarkapp.com/api_tokens). You can save this API key as the `AUTH_POSTMARK_KEY` environment variable.
 
 ```sh
 AUTH_POSTMARK_KEY=abc