Update docs/release-notes/RELEASE-NOTES-2.1.0.md
Update docs/release-notes/RELEASE-NOTES-2.1.0.md

Co-Authored-By: zp-sd <f6e47991044cf6047ffdfd9ca523f3b9882886be@gmail.com>
aeternity/epoch,aeternity/epoch,aeternity/epoch,aeternity/epoch