update_engine: typo am: b66e62c7dd

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2971282

Change-Id: I20a83117f7700d9a3b2e26e3ada863a83d6f0c41
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>