Set "BUNDLE_GEMFILE: jh/Gemfile" into .gitlab-ci.yml

What does this MR do and why?

Fix Job: https://jihulab.com/gitlab-cn/gitlab/-/jobs/16782965

解决 Pipeline 中出现的大量依赖报错。

问题原因：Upstream MR（!162636）向 Pipeline 写死了 Variable：

BUNDLE_GEMFILE: "Gemfile"

导致极狐的 jh/Gemfile 没有生效。

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