dhi: cli quick ref update

Signed-off-by: Craig Osterhout <craig.osterhout@docker.com>

Author: craig-osterhout

content/manuals/dhi/how-to/cli.md

@@ -113,7 +113,9 @@ The CLI can be used to create and manage DHI image customizations. For detailed
 instructions on creating customizations, including the YAML syntax and
 available options, see [Customize a Docker Hardened Image](./customize.md).
 
-Quick reference for CLI commands:
+The following is a quick reference for CLI commands. For complete details on all
+options and flags, see the
+[CLI reference](/reference/cli/docker/dhi/).
 
 ```bash
 # Prepare a customization scaffold
@@ -138,6 +140,7 @@ docker dhi customization list --org my-org --source golang
 docker dhi customization get my-org/dhi-golang "golang with git" --org my-org --output my-customization.yaml
 
 # Update a customization
+# The YAML file must include the 'id' field to identify the customization to update
 docker dhi customization edit my-customization.yaml --org my-org
 
 # Delete a customization