Doesn't work in Markdown files

[alexschcom]

What version of prettier-plugin-tailwindcss are you using?

For example: v0.8.0

What version of Tailwind CSS are you using?

For example: v4.3.2

What version of Node.js are you using?

For example: v22.20.0

What package manager are you using?

For example: npm

What operating system are you using?

For example: macOS

Reproduction URL

https://github.com/alexschcom/prettier-md

Describe your issue

This plugin doesn't seem to work in Markdown files. Am I doing something wrong? Thanks!