IntelliSense does not expose the `theme()` function

[Serator]

What version of Tailwind CSS IntelliSense are you using?

v0.9.11

What version of Tailwind CSS are you using?

v3.3.1

What package manager are you using?

npm

What operating system are you using?

Windows

Tailwind config

Standard

VS Code settings

Standard

Reproduction URL
https://play.tailwindcss.com/VPfrH1DFlu

Describe your issue

IntelliSense does not expose the theme() function, which results in invalid CSS in the tooltip.