pw_allocator: Update OWNERS

Change-Id: I5375c39e7d0814e92a559bc2bb23e797dc7a637e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/203211
Reviewed-by: Taylor Cramer <cramertj@google.com>
Commit-Queue: Aaron Green <aarongreen@google.com>
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
diff --git a/pw_allocator/OWNERS b/pw_allocator/OWNERS
index 3afb926..e53f729 100644
--- a/pw_allocator/OWNERS
+++ b/pw_allocator/OWNERS
@@ -1 +1,3 @@
+aarongreen@google.com
+cramertj@google.com
 frolv@google.com