Backport of chore: Update slack channel id for CRT into release/0.19.x#6151

hc-github-team-secure-boundary wants to merge 1 commit intorelease/0.19.xhashicorp/boundary:release/0.19.xfrom

backport/crt-update-slack-channel-id/possibly-enjoyed-heronhashicorp/boundary:backport/crt-update-slack-channel-id/possibly-enjoyed-heronCopy head branch name to clipboard