astro-v7-mdx-container-api-warning

Steps to reproduce

1. Clone this repository
2. Run pnpm install
3. Run pnpm dev
4. Visit http://localhost:4321/ in your browser and notice a warning message in your terminal:

   [astro] `markdown.gfm` and `markdown.smartypants` are deprecated. Move them onto your processor instead (e.g. `satteri({ features: { gfm: false, smartPunctuation: false } })`, or `unified({ gfm: false, smartypants: false })` from `@astrojs/markdown-remark`). Will be removed in a future major.