docs-bug(COMPONENT): I can no longer view the docs with m2 specs (the default styles) for version v17.X

### Documentation Feedback

The version switcher on the docs site allows me to switch between latest and v16, but not between latest and v17.1, which is the version of Angular Material before the components began switching to m3 specs. Because v16 is not 1:1 compatible with v17, this means there's no way to view the documentation for a version that I (and probably many others) am stuck using for an indefinite period of time.

### Affected documentation page

https://material.angular.io/components/categories

从 https://material.angular.io/components/categories 上的版本切换器开始，比较可用的 latest、v16 和 v17.1 文档版本。跟踪文档站点的版本配置，并验证可以选择 v17.1，且它会与现有版本一同显示 pre-M3 组件文档。

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