fix(deps): update nextra monorepo to v2.9.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
nextra	2.8.0 -> 2.9.0
nextra-theme-docs	2.8.0 -> 2.9.0

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Release Notes

shuding/nextra (nextra)

### [`v2.9.0`](https://togithub.com/shuding/nextra/releases/tag/nextra-theme-docs%402.9.0) [Compare Source](https://togithub.com/shuding/nextra/compare/nextra@2.8.0...nextra@2.9.0) ##### Minor Changes - [`16bbb88`](https://togithub.com/shuding/nextra/commit/16bbb88): Move below packages to nextra package - `` and `` - `` and `` - `` - `` to import them you can use the following in your official `nextra-theme-blog` and `nextra-theme-docs` ```js import { Card, Cards } from 'nextra/components' ``` ```js import { Tab, Tabs } from 'nextra/components' ``` ```js import { Steps } from 'nextra/components' ``` ```js import { FileTree } from 'nextra/components' ``` ##### Patch Changes - [`b1a7eba`](https://togithub.com/shuding/nextra/commit/b1a7eba): `opens in new tab` span element should have `user-select: none` - Updated dependencies \[[`16bbb88`](https://togithub.com/shuding/nextra/commit/16bbb88)] - Updated dependencies \[[`23a25b1`](https://togithub.com/shuding/nextra/commit/23a25b1)] - nextra@2.9.0

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Latest commit: 5a1dc0efe1e486b16b2671bfe4bc0c9f7e07eeaa

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