Update shell message

docs/Userguide_login.rst

@@ -193,7 +193,7 @@ connections to it (until Slurm is upgraded to version 22.05 or later).
 Using a non-Bash Unix shell
 ---------------------------
 
-While Mila will not provide personalized support for non-Bash Unix
-shell on the cluster, the cluster is designed to support both Bash and Zsh
-shells. If you think things should work with Zsh and they don't, please contact
-`Mila's IT support <https://it-support.mila.quebec>`_.
+While Mila does not provide support in debugging your shell setup, the cluster
+is designed to support at least both Bash and Zsh shells. If you think things
+should work within Bash or Zsh and they don't, please contact `Mila's IT
+support <https://it-support.mila.quebec>`_.