fix OWNERS path

The find owners module will use the path in the current repo as the
implicit prefix even when crossing repo boundaries, so make sure we
have an explicit / anchor when loading.  It doesn't make a difference
in this repo, but might as well avoid copy & paste confusion.

BUG=None
TEST=find owners can find owners for this

Change-Id: I6b20e46e6e8c5f7a4e41f5474cff4a31f888525a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/graphyte/+/2336815
Tested-by: Mike Frysinger <vapier@chromium.org>
Auto-Submit: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Commit-Queue: Hung-Te Lin <hungte@chromium.org>
diff --git a/OWNERS b/OWNERS
index c8e7fff..d6ec780 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,2 +1,2 @@
 # The graphyte is currently maintained by Chrome OS factory team.
-include chromiumos/platform/factory:OWNERS
+include chromiumos/platform/factory:/OWNERS