📝 Update docs to use markdown-include-variants

[YuriiMotov]

No description provided.

[github-actions]

📝 Docs preview

Last commit e2ec63f at: https://ccb320c1.asyncer.pages.dev

Modified Pages

• https://ccb320c1.asyncer.pages.dev/tutorial/asyncify/ - (before)
• https://ccb320c1.asyncer.pages.dev/tutorial/first-steps/ - (before)
• https://ccb320c1.asyncer.pages.dev/tutorial/runnify/ - (before)
• https://ccb320c1.asyncer.pages.dev/tutorial/soonify-return/ - (before)
• https://ccb320c1.asyncer.pages.dev/tutorial/soonify/ - (before)
• https://ccb320c1.asyncer.pages.dev/tutorial/syncify-no-raise/ - (before)
• https://ccb320c1.asyncer.pages.dev/tutorial/syncify/ - (before)

[tiangolo]

Amazing, thank you! 🚀 🙌