Add janitors to the OWNERS file am: 4658247c15

Original change: https://android-review.googlesource.com/c/platform/external/python/pyyaml/+/3423946

Change-Id: I97083c22b82f261241e8d20ff82598a394ad6b7c
Signed-off-by: Automerger Merge Worker <[email protected]>