[Doc] Lack of documentation of the louvain algorithm in Traverser

[liuxiaocs7]

Problem Type (问题类型)

lack info (文档描述缺失)

Your Question (问题描述)

as title

[github-actions[bot]]

Due to the lack of activity, the current issue is marked as stale and will be closed after 20 days, any update will remove the stale label