Update bug reporting instructions for docs (#10001)
Update bug reporting instructions for docs (#10001)

Closes #9963.

Co-authored-by: craigbox <3355725988ab83bea208126f1f041f483a3559f0@google.com>
istio/istio.io,istio/istio.io,istio/istio.io,istio/istio.io,istio/istio.io,istio/istio.io,istio/istio.io