fix docker ps help message

Signed-off-by: Xian Chaobo <xianchaobo@huawei.com>
Upstream-commit: a153e80f72274c05589145011c16cc1d7f8ee75f
Component: engine

components/engine/docs/sources/reference/commandline/cli.md

@@ -1497,6 +1497,8 @@ The filtering flag (`-f` or `--filter)` format is a `key=value` pair. If there i
 than one filter, then pass multiple flags (e.g. `--filter "foo=bar" --filter "bif=baz"`)
 
 Current filters:
+ * id (container's id)
+ * name (container's name)
  * exited (int - the code of exited containers. Only useful with '--all')
  * status (restarting|running|paused|exited)