OWNERS: Relax for expectation files

Change-Id: Ib8bc7f27ae27b2b579c8748c6680055eb22e5c55
Reviewed-on: https://pigweed-review.googlesource.com/c/infra/recipes/+/100202
Reviewed-by: Ted Pudlik <tpudlik@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Pigweed-Auto-Submit: Rob Mohr <mohrr@google.com>
diff --git a/OWNERS b/OWNERS
index 83c23b8..ed65b30 100644
--- a/OWNERS
+++ b/OWNERS
@@ -3,3 +3,7 @@
 nmulcahey@google.com
 olivernewman@google.com
 tpudlik@google.com
+
+# Anyone can make changes to expectation files, which are generated purely from
+# source-of-truth recipe code.
+per-file *.expected/*.json = *