Update CHANGELOG.md
Update CHANGELOG.md

Co-authored-by: N. Taylor Mullen <2dd1590fd832a5e1c8567d718938b5e15c0e595b@microsoft.com>
gregg-miskelly/omnisharp-vscode,OmniSharp/omnisharp-vscode,OmniSharp/omnisharp-vscode,OmniSharp/omnisharp-vscode,OmniSharp/omnisharp-vscode,gregg-miskelly/omnisharp-vscode,OmniSharp/omnisharp-vscode,gregg-miskelly/omnisharp-vscode,gregg-miskelly/omnisharp-vscode