docs: add -insecure arg to the example client (#141)
docs: add -insecure arg to the example client (#141)

Without -insecure=true, the grpc-client example client fails with the following error:
transport: authentication handshake failed

Co-authored-by: Alex Hong <a9ccb06cbb47e15d85bcb2cc9161076d89dbbe0a@users.noreply.github.com>
googleforgames/open-saves,googleforgames/open-saves