更新 Bitwarden_rs

[sve1r]

Bitwarden_RS 原仓库已重命名

为了区分品牌辨识度，原开发者对 Bitwarden_RS 仓库进行了重命名。 更新至新仓库可以尽可能的避免部署失败的现象。

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更新内容：

• 更新了 Dockerfile 中的镜像名
• 更新 Readme.md

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公告原文： 📢 The project which was known as Bitwarden_RS and has been renamed to separate itself from the official Bitwarden server in the hopes of avoiding confusion and trademark/branding issues. Please see #1642 for more explanation.