docs: add blurb about assigning teams (#3174)
docs: add blurb about assigning teams (#3174)

* docs: add blurb about assigning teams

* fix typo

Co-authored-by: gcf-merge-on-green[bot] <6c7a4de7cdf40496888e303ea3f489f3cc742362@users.noreply.github.com>
googleapis/repo-automation-bots,googleapis/repo-automation-bots,googleapis/repo-automation-bots,googleapis/repo-automation-bots,googleapis/repo-automation-bots