chore: fix broken mainline link (#13015)

* docs(releases): fix 404 for mainline link

* Delete x.sh

* Update releases.md

* docs: format and use term 'bleeding edge' for mainline releases

docs/install/releases.md

@@ -8,9 +8,10 @@ their infrastructure on a staging environment before upgrading a production
 deployment.
 
 We support two release channels:
-[mainline](https://github.com/coder/coder/2.10.0) for the edge version of Coder
-and [stable](https://github.com/coder/coder/releases/latest) for those with
-lower tolerance for fault. We field our mainline releases publicly for one month
+[mainline](https://github.com/coder/coder/releases/tag/v2.10.1) for the bleeding
+edge version of Coder and
+[stable](https://github.com/coder/coder/releases/latest) for those with lower
+tolerance for fault. We field our mainline releases publicly for one month
 before promoting them to stable.
 
 ### Mainline releases