Update command for scanning Docker images with wizcli (#24628)

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## Description

This PR fixes the command to scan DHI with `wizcli`. 

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Author: cdupuis

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

@@ -371,7 +371,7 @@ Docker Hardened Image by pulling the image and running the scan command:
 ```console
 $ docker login dhi.io
 $ docker pull dhi.io/<image>:<tag>
-$ wiz docker scan --image dhi.io/<image>:<tag>
+$ wizcli scan container-image dhi.io/<image>:<tag>
 ```
 
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