v3.5.2
feat(mdx-loader): wrap mdx content title (`# Title`) in `<header>` for concistency (#10335)
misc: make copyUntypedFiles work for watch mode (#7445)
docs: document siteConfig.markdown + better mdx-loader retrocompat (#8419)
chore: simplify TypeScript configs, use TS 5.5 configDir placeholder (#10256)