[BUG] No bold text with variable fonts

[Ohaaa]

Before you start

• The issue does not occur when previewing with Tinymist in VSCode

Describe the bug
Bold text is not rendered as bold in variable fonts. Direct compilation with typst watch generates the correct PDF. The issue appears in both Firefox and Chromium.

To Reproduce
Steps to reproduce the behavior:

1. Use a variable font (e.g. Adwaita Sans)
2. Start nvim Tinymist preview with bold text
3. See no bold text

Expected behavior
The text should be bold.

Screenshots

Desktop (please complete the following information):

• OS: Arch Linux
• Typst: 0.15.1 (9dfd3a08)
• Tinymist: v0.15.2