Update environment-and-modules.md

docs.it4i/environment-and-modules.md

@@ -2,7 +2,9 @@
 
 ## Shells on Clusters
 
-The table shows which shells are supported on the IT4Innovations clusters.
+The table shows which shells are available on the IT4Innovations clusters.
+
+Note that bash is the only supported shell.
 
 | Cluster Name    | bash | tcsh | zsh | ksh | dash |
 | --------------- | ---- | ---- | --- | --- | ---- |
@@ -11,7 +13,7 @@ The table shows which shells are supported on the IT4Innovations clusters.
 | DGX-2           | yes  | no   | no  | no  | no   |
 
 !!! info
-    BASH is the default shell. Should you need a different shell, contact [support\[at\]it4i.cz][3].
+    Bash is the default shell. Should you need a different shell, contact [support\[at\]it4i.cz][3].
 
 ## Environment Customization