fix: correct vault commands

jx secret import does not exist, but on the other hand jx secret vault shell is worth mentioning

Signed-off-by: Mårten Svantesson <Marten.Svantesson@ticket.se>

content/en/v3/admin/setup/secrets/_index.md

@@ -73,7 +73,7 @@ To do this you can run the [jx secret vault portforward](https://github.com/jenk
 jx secret vault portforward
 ```                  
 
-You should then be able to run the following `jx secret edit` or `jx secret import` commands.
+You should then be able to run the following `jx secret edit` command. You can also run the `jx secret vault shell` command, which gives you a shell with an environment where you can can issue `vault` commands.
 
 ## Edit Secrets