OWNERS: Include Pigweed OWNERS

Change-Id: I3cf81e99fa9f0c6b27a27c3e5c55009b5622ffba
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/kudzu/+/176787
Reviewed-by: Anthony DiGirolamo <tonymd@google.com>
Commit-Queue: Rob Mohr <mohrr@google.com>
diff --git a/OWNERS b/OWNERS
index bb9c3a8..7dcb73c 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,3 +1,5 @@
 amontanez@google.com
 konkers@google.com
 tonymd@google.com
+
+file:pigweed/pigweed:main:/OWNERS