Minor breadcrumb style updates (#14070)

Minor breadcrumb style updates

Before:

![CleanShot 2024-07-10 at 12 42
46@2x](https://github.com/zed-industries/zed/assets/1714999/9e1d4fb7-7549-4749-85f8-797f59d06c4d)

After:

![CleanShot 2024-07-10 at 12 42
36@2x](https://github.com/zed-industries/zed/assets/1714999/f448eb0a-deac-4a8e-b26e-67d559c4c679)


Release Notes:

- N/A

Nate Butler committed 2y ago

95637a032028a5225dc2e39c8b6e0f35365eba50

Parent: ee623f7

Committed by GitHub <noreply@github.com> on 7/10/2024, 6:04:17 PM