Update doc about preparing Pixel 6 for pKVM am: 60c8aef052

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2121374

Change-Id: I02212d1242a79bf13ee02ec3329db81979f6d1ef
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>