Fix YFII vault 修复YFII保险库

This YIP is simple. I would like to suggest this proposal to prioritize YFII vault over everything currently in the works.

I understand the team is trying to make big changes and works to improve the vault, but we are greatly falling behind compared to every other project because we do not have a functioning vault. The machine gun pool is now the 0% APY pool, this needs to change asap.

Thank you.

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这个YIP很简单。 我想提出这个建议，使YFII保管库的优先级高于目前正在进行的所有工作。

我了解团队正在努力进行重大更改并努力改善保管库，但是与其他项目相比，我们远远落后于其他项目，因为我们没有保管库可以正常运行。 机枪池现在是0％APY池，这需要尽快更改。

谢谢。