docker load: Typofix in examples

Remove the double "docker docker" from example

Signed-off-by: Henry Ne <henrynmail-github@yahoo.de>
(cherry picked from commit 79c489d812)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

components/cli/docs/reference/commandline/load.md

@@ -35,7 +35,7 @@ bzip2, or xz) from a file or STDIN. It restores both images and tags.
 ## Examples
 
 ```bash
-$ docker docker image ls
+$ docker image ls
 
 REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE