Update docs/english/concepts/adding-agent-features.md

Co-authored-by: Michael Brooks <mbrooks@slack-corp.com>

Author: lukegalbraithrussell

docs/english/concepts/adding-agent-features.md

@@ -53,8 +53,8 @@ slack install -E local
 ```sh
 SLACK_CLIENT_ID=YOUR_CLIENT_ID
 SLACK_CLIENT_SECRET=YOUR_CLIENT_SECRET
-SLACK_REDIRECT_URI=https://YOUR_NGROK_SUBDOMAIN.ngrok-free.app/slack/oauth_redirect
 SLACK_SIGNING_SECRET=YOUR_SIGNING_SECRET
+SLACK_REDIRECT_URI=https://YOUR_NGROK_SUBDOMAIN.ngrok-free.app/slack/oauth_redirect
 ```
 
 7. Start the app: