docs(instance): add local-image list command

Author: estellesoulard

docs/resources/instance_server.md

@@ -222,6 +222,8 @@ You can check the available labels with our [CLI](https://www.scaleway.com/en/do
 
 To retrieve more information by label please use: ```scw marketplace image get label=<LABEL>```
 
+To obtain a local-image UUID from a label, please use: ```scw marketplace local-image list image-label=<LABEL>```
+
 - `name` - (Optional) The name of the server.
 
 - `tags` - (Optional) The tags associated with the server.