net: Add comment to bnc in net/OWNERS

See https://crrev.com/c/1704282 for context.

Change-Id: I54fd3eae5e96cc6018f6378c9db40025c33000d6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1735979Reviewed-by: Bence Béky <bnc@chromium.org>
Reviewed-by: Gabriel Charette <gab@chromium.org>
Reviewed-by: Ryan Hamilton <rch@chromium.org>
Commit-Queue: Bence Béky <bnc@chromium.org>
Commit-Queue: Jesse Schettler <jschettler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#684017}

net/OWNERS

 agl@chromium.org
 asanka@chromium.org
-bnc@chromium.org
 davidben@chromium.org
 ericorth@chromium.org
 eroman@chromium.org
@@ -14,6 +13,9 @@ rch@chromium.org
 rsleevi@chromium.org
 zhongyi@chromium.org
 
+# For QUICHE rolls only.
+bnc@chromium.org
+
 per-file BUILD.gn=file://net/nqe/OWNERS
 per-file BUILD.gn=file://net/websockets/OWNERS