Update setup.en.md

docs/setup.en.md

@@ -64,7 +64,7 @@ web-push generate-vapid-keys
 
 *(optional)* Create a twitter application
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-If you want to enable the twitter integration, you need to create a twitter app at [apps.twitter.com](https://apps.twitter.com/).
+If you want to enable the twitter integration, you need to create a twitter app at [https://developer.twitter.com/en/apply/user](https://developer.twitter.com/en/apply/user).
 
 In the app you need to set the oauth callback url as : https://misskey-instance/api/tw/cb