Add v1.8.0-v1.8.5 release notes (#2007)
Add v1.8.0-v1.8.5 release notes (#2007)

Co-authored-by: aaronbuchwald <2bdae7df318135f8d15de09add92195b952e1aa5@gmail.com>
ava-labs/avalanchego,ava-labs/avalanchego