doc: Update Slack channels in onboarding issue (!7196) · Merge requests · GitLab.org / gitaly · GitLab

James Liu requested to merge jliu/update-slack-channels into master Aug 20, 2024

Adds a link to the new #gitaly-deployments Slack channel, and updates descriptions for the other Gitaly channels to reflect the changes made in gitlab-org/quality/engineering-productivity/team#553 (comment 2061141743)