Update docs to use the correct canonicalization reference am: fcff3dd6c7

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2994271

Change-Id: I8f7eadf7a854421385052ae2613acb14bbd0e473
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>