bump beta channel and add changelog

Minor update to release notes

1.6.3-beta4

beta bump

update version and add changelog

Add issue to electron 3 upgrade note

1.6.2 release notes

bump for beta

and changelog notes

Update changelog.json

Co-Authored-By: outofambit <outofambit@github.com>

Apply suggestions from code review

Co-Authored-By: Billy Griffin <billygriffin@users.noreply.github.com>