Merge branch '435292-doc' into 'master'

Add CustomersDot installation guide in AI Feature doc

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/141972



Merged-by: Shinya Maeda <shinya@gitlab.com>
Approved-by: Tetiana Chupryna <tchupryna@gitlab.com>
Reviewed-by: Tetiana Chupryna <tchupryna@gitlab.com>
Reviewed-by: Mark Chao <mchao@gitlab.com>
Co-authored-by: Mark Chao <mchao@gitlab.com>