It looks like our air-gapped installation guide is broken. The `oc-mirror` command we tell users to run no longer works as-is.

If you follow the current docs for an air-gapped install, the `oc-mirror` step fails with this error:

⚠️ the use of the flag --v1 or --v2 is mandatory, please use --v2 for the supported oc-mirror version or --v1 to continue using the deprecated version

The Cause

The oc-mirror tool itself changed. It now requires you to specify which engine version to use. The tool recommends --v2, which is the modern, supported version we should be guiding our users toward anyway.

The Fix

It looks like the fix is easy.  We just need to update the command in the documentation to include the --v2 flag.

• Old command: `oc-mirror --config ImageSetConfiguration.yaml archive`
• New command: oc-mirror --config ImageSetConfiguration.yaml archive --v2

We should also mention which from which version this is necessary. I only know that in the latest supported OCP (4.19) version flag is required