docs: regenerate CLI reference

website/docs/9-cli-reference/uc_machine_ls.md

@@ -10,6 +10,7 @@ uc machine ls [flags]
 
 ```
   -h, --help            help for ls
+  -o, --output string   Output format: 'json' or empty for a human-readable table.
 ```
 
 ## Options inherited from parent commands