HW Relnotes: Sync hardware notes from ure(4)

Add the ure driver to the Ethernet Interfaces section of the
Hardware Release Notes for the template and the upcoming 14.3R.

Reviewed by: mhorne, ziaee
Approved by: mhorne (mentor)
Discussed with: bsdimp, cperciva
Pull Request: https://github.com/freebsd/freebsd-doc/pull/486