docs: fix misspelled upgrade-instruction path

[simpleqt]

背景 / Description

self-host/upgrading/upgrade-intruction(.en).mdx 文件名拼写错误（intruction → instruction）。本 PR 将两个文件重命名（内容零改动），并同步更新全部引用：

• 各部署/排障文档中的相对链接（docker、sealos、attention 等）
• toc.mdx / toc.en.mdx 目录项
• upgrading/meta(.en).json sidenav 元数据
• middleware.ts 中的重定向目标
• page.tsx 版本时间线排除列表
• doc-last-modified.json 的键

重命名后全树检索 upgrade-intruction 为 0 处。

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[Copilot]

Pull request overview

This PR corrects a misspelled self-host upgrade guide filename (upgrade-intruction → upgrade-instruction) across the documentation site, and updates all internal references so navigation, sidenav metadata, and redirects continue to point at the correct page.

Changes:

• Renamed the upgrade guide MDX files to the correct spelling and updated toc + sidenav metadata to reference the new slug.
• Updated doc links across deployment/troubleshooting pages to point at upgrade-instruction.
• Updated middleware redirects, version-timeline filtering, and last-modified index keys to match the new path.

Reviewed changes

Copilot reviewed 13 out of 15 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
document/middleware.ts	Updates legacy redirect targets to the corrected upgrade guide path.
document/data/doc-last-modified.json	Renames the last-modified keys for the upgrade guide files.
document/content/toc.mdx	Updates toc entry to the corrected upgrade guide slug.
document/content/toc.en.mdx	Updates English toc entry to the corrected upgrade guide slug.
document/content/self-host/upgrading/upgrade-instruction.mdx	Renamed/added the Chinese upgrade guide under the corrected filename.
document/content/self-host/upgrading/upgrade-instruction.en.mdx	Renamed/added the English upgrade guide under the corrected filename.
document/content/self-host/upgrading/meta.json	Updates sidenav page list to the corrected slug.
document/content/self-host/upgrading/meta.en.json	Updates English sidenav page list to the corrected slug.
document/content/self-host/troubleshooting/attention.mdx	Updates relative link to the corrected upgrade guide slug.
document/content/self-host/troubleshooting/attention.en.mdx	Updates relative link to the corrected upgrade guide slug.
document/content/self-host/deploy/sealos.mdx	Updates relative links to the corrected upgrade guide filename.
document/content/self-host/deploy/sealos.en.mdx	Updates relative links to the corrected upgrade guide filename.
document/content/self-host/deploy/docker.mdx	Updates relative link to the corrected upgrade guide filename.
document/content/self-host/deploy/docker.en.mdx	Updates relative link to the corrected upgrade guide filename.
document/app/[lang]/(docs)/[...slug]/page.tsx	Updates the version timeline exclusion filter to match the corrected slug.

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