Update nextjs monorepo to v13.4.12

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@next/mdx	13.4.11 -> 13.4.12
next (source)	13.4.11 -> 13.4.12

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Release Notes

vercel/next.js (@​next/mdx)

v13.4.12

Compare Source

Core Changes

• Separate routing code from render servers: #​52492
• Move Pages API rendering into bundle: #​52149
• update Turbopack: #​52986
• Turbopack: Refactoring module references: #​52930
• Increase timeout for 404 tests: #​52998
• Reland "Refine the not-found rendering process for app router": #​52985
• Revert "Separate routing code from render servers (#​52492)": #​53016

Documentation Changes

• "Clarify the 'Existing Projects' section of the TypeScript docs:: #​52944
• Update 02-dynamic-routes.mdx: #​52975
• chore(docs): fix broken link: #​53021

Misc Changes

• Update to latest version of turborepo: #​52979
• Update swc_core to v0.79.22: #​52945
• chore(ci): add pnpm workspace for github actions: #​52976
• Changed package manager for install-native.mjs to pnpm: #​52971
• update CODEOWNERS config: #​53017

Credits

Huge thanks to @​ijjk, @​wyattjoh, @​sokra, @​kdy1, @​alexkirsz, @​styfle, @​ShaunFerris, @​syedtaqi95, @​Heidar-An, @​huozhi, and @​ztanner for helping!

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