gpui: Use static keyword with `LazyLock` when loading system fonts (#34555)

Use the `static` keyword to actually make the `LazyLock` static, which
previously would reinitialize on every call to `SvgRenderer::new`.

Related: #26335 

Release Notes:

- N/A
7e3fd7bb02tidely committed on 7/18/2025, 10:35:38 AM· committed by GitHubparent00097df
1 file changedLine totals unavailable