update: staging.md

Co-authored-by: Priyanka Saggu <[email protected]>

Author: Okabe-Junya

contributors/devel/sig-architecture/staging.md

@@ -28,4 +28,4 @@ If further repos under staging are needed, adding them to the bot is easy.
 Contact one of the [owners of the bot](https://git.k8s.io/publishing-bot/OWNERS).
 
 Currently, the bot is hosted on a
-[public CNCF cluster](https://git.k8s.io/publishing-bot/k8s-publishing-bot.md).
+[public CNCF cluster](https://github.com/kubernetes/publishing-bot/blob/master/production.md).