Update docs/link.md w/ suggestion

Co-authored-by: Jonathan Yu <jonathan@coder.com>

Author: ashumz

docs/link.md

@@ -2,7 +2,7 @@
 Run code-server with the beta flag `--link` and you'll get TLS, authentication, and a dedicated URL 
 for accessing your IDE out of the box.
 
-```bash
+```shell-session
 $ code-server --link
 Proxying code-server, you can access your IDE at https://example.cdr.co
 ```