Update CLI.md (#1508)

* Update CLI.md

Update the suggested command template for "trust keys", to make it consistent with other examples.

Signed-off-by: hosseinsia <[email protected]>

* Update docs/CLI.md

Remove the + to avoid confusion.

Co-authored-by: Martin Vrachev <[email protected]>
Signed-off-by: hosseinsia <[email protected]>

Co-authored-by: Martin Vrachev <[email protected]>

Author: hosseinsia

docs/CLI.md

@@ -153,7 +153,7 @@ itself.  The --trust command-line option, in conjunction with --pubkeys and
 --role, can be used to indicate the trusted keys of a role.
 
 ```Bash
-$ repo.py --trust --pubkeys --role
+$ repo.py --trust --pubkeys </path/to/foo_key.pub> --role <rolename>
 ```
 
 For example: