Update samm-cli.adoc

Add SAMM CLI List of commands as a subheading for better structure. This allows a deeplink to the command list without scrolling. Quicker reference for people who may not know that there is a list of commands on this page

Author: chris-volk

documentation/developer-guide/modules/tooling-guide/pages/samm-cli.adoc

@@ -53,6 +53,7 @@ or `samm aspect --help`.
 Each subcommand can have its own set of options which allow the user to further fine-tune the execution of the command.
 The available options and their meaning can also be seen in the help text of the individual subcommands.
 
+=== SAMM CLI List of commands
 [width="100%",options="header",cols="20,50,30"]
 |===
 | Command | Description/Options | Examples