Merge branch 'docs-whitespace-cleanup-2' into 'master'

Cleaning up more list nesting and whitespace - blueprints/dev docs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/145103



Merged-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: Amy Qualls <aqualls@gitlab.com>
Co-authored-by: Marcel Amirault <mamirault@gitlab.com>