pw_presubmit: Exclude all OWNERS from copyright

Exclude all OWNERS-related files from copyright checks.

Change-Id: Ieed26166a2321ee608ce8612e31dbd7e2540b739
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/209031
Reviewed-by: Armando Montanez <amontanez@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed-service-accounts.iam.gserviceaccount.com>
Pigweed-Auto-Submit: Rob Mohr <mohrr@google.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
diff --git a/pw_presubmit/py/pw_presubmit/pigweed_presubmit.py b/pw_presubmit/py/pw_presubmit/pigweed_presubmit.py
index 9eeca9d..7b50937 100755
--- a/pw_presubmit/py/pw_presubmit/pigweed_presubmit.py
+++ b/pw_presubmit/py/pw_presubmit/pigweed_presubmit.py
@@ -1008,9 +1008,9 @@
     # keep-sorted: end
     # Metadata
     # keep-sorted: start
+    r'\b.*OWNERS.*$',
     r'\bAUTHORS$',
     r'\bLICENSE$',
-    r'\bOWNERS$',
     r'\bPIGWEED_MODULES$',
     r'\bgo.(mod|sum)$',
     r'\bpackage-lock.json$',