Update capacity planning url
What does this MR do and why?
update url in capacity planning
message
update handbook url
_from:_https://gitlab.cn/handbook/engineering/workflow#%E5%85%B3%E4%BA%8E%E5%B7%A5%E4%BD%9C%E9%87%8F%E8%A7%84%E5%88%92
to: https://jihulab.com/gitlab-cn/handbook/-/blob/main/sites/handbook/source/handbook/engineering/workflow/index.html.md?ref_type=heads#%E5%85%B3%E4%BA%8E%E5%B7%A5%E4%BD%9C%E9%87%8F%E8%A7%84%E5%88%92
_NOT update capacity doc link because it is already updated, _here