Merge branch 'patch-migration_to_barnard' into 'preview'

Update migration_to_barnard.md:

See merge request !1166

doc.zih.tu-dresden.de/docs/archive/migration_to_barnard.md

-# CPU Cluster Barnard
+# Migrate to CPU Cluster Barnard (Outdated)
 
 * [Prepare login to Barnard](#login-to-barnard)
 * [Data management and data transfer to new filesystems](#data-management-and-data-transfer)
@@ -162,10 +162,10 @@ target filesystems.
     [workspaces](../data_lifecycle/workspaces.md). Before you invoke any data transer from the old
     working filesystems to the new ones, you need to allocate a workspace first.
 
-    The command `ws_list --list` lists the available and the default filesystem for workspaces.
+    The command `ws_list -l` lists the available and the default filesystem for workspaces.
 
     ```
-    marie@barnard$ ws_list --list
+    marie@barnard$ ws_list -l
     available filesystems:
     horse (default)
     walrus