Update OWNERS file am: a4b0b21340

Original change: https://android-review.googlesource.com/c/platform/external/XNNPACK/+/2974220

Change-Id: Ibd9e1cd4ce04ca7c9ad9b5461786f592a3a1763e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>