sysutils/cni-epair: Update to 1.2.1

[ahze]

Summary

The jail side is configured with ifconfig -j and route -j from the host,
so an image without an ifconfig of its own gets a network. Needs 14.0 or
newer

Changelog: https://github.com/daemonless/cni-epair/releases/tag/v1.2.1