theme_importer: Add missing color imports for the minimap thumb (#34724)

These should have been part of
https://github.com/zed-industries/zed/pull/30785 but I forgot to add
them there.

Release Notes:

- N/A
8bc8d61fa6Finn Evers committed on 7/18/2025, 4:55:03 PM· committed by GitHubparent750ceeb
1 file changedLine totals unavailable