Update document for jira install

What does this MR do and why?

GitLab for Jira Cloud doesn't support JiHu user, we add an new App to atlassian marketplace Since JiHu GitLab for Jira Cloud published in atlassian, Update the document for user guide

More details:https://jihulab.com/gitlab-cn/gitlab/-/issues/2847 https://marketplace.atlassian.com/apps/1231119/jihu-gitlab-for-jira-cloud?hosting=cloud&

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