update URL to now-available blog post PiperOrigin-RevId: 706799003 Change-Id: Ic5985efa45619873be7b8bf8e84f4009444a5dcd Reviewed-on: https://go-review.googlesource.com/c/open2opaque/+/636816 Reviewed-by: Michael Stapelberg <stapelberg@google.com> TryBot-Bypass: Michael Stapelberg <stapelberg@google.com> Reviewed-by: Chressie Himpel <chressie@google.com>
The program open2opaque migrates Go code using Go Protobuf from the Open API to the Opaque API.
See https://go.dev/blog/protobuf-opaque for context.