fix(docs): update folders documentation

[benjick]

admin.folders does not exist, but folders do

[github-actions]

Pull Request titles must follow the Conventional Commits specification and have valid scopes.

Unknown scope "docs" found in pull request title "fix(docs): update folders documentation". Scope must match one of: cpa, db-*, db-mongodb, db-postgres, db-vercel-postgres, db-sqlite, drizzle, email-*, email-nodemailer, email-resend, eslint, graphql, live-preview, live-preview-react, next, payload-cloud, plugin-cloud, plugin-cloud-storage, plugin-form-builder, plugin-import-export, plugin-multi-tenant, plugin-nested-docs, plugin-redirects, plugin-search, plugin-sentry, plugin-seo, plugin-stripe, richtext-*, richtext-lexical, richtext-slate, sdk, storage-*, storage-azure, storage-gcs, storage-uploadthing, storage-vercel-blob, storage-s3, translations, ui, templates, examples(/(\w|-)+)?, deps.

feat(ui): add Button component
^    ^    ^
|    |    |__ Subject
|    |_______ Scope
|____________ Type

[benjick]

Which scope should I use?