Merge pull request #1628 from tnull/2022-07-readme-remove-slack
authorMatt Corallo <649246+TheBlueMatt@users.noreply.github.com>
Wed, 27 Jul 2022 19:10:04 +0000 (19:10 +0000)
committerGitHub <noreply@github.com>
Wed, 27 Jul 2022 19:10:04 +0000 (19:10 +0000)
Remove Slack link and other updates to `README`


Trivial merge