Changelog update; redo 4.20.1 release (#283)
Changelog update; redo 4.20.1 release (#283)

* changelog update

* Update CHANGELOG.md

Co-authored-by: John Lyons <ccdf991c5bb9582918d954f6f7ebf5e3ee6e9738@blackbaud.com>

* Update CHANGELOG.md

Co-authored-by: Alex Kingman <9eee0dcdc74377e0c717ed9c6d9cd9889609b829@blackbaud.me>
Co-authored-by: John Lyons <ccdf991c5bb9582918d954f6f7ebf5e3ee6e9738@blackbaud.com>
blackbaud/skyux,blackbaud/skyux,blackbaud/skyux