fix(ui): minor formatting (#8136)
### Description
Two minor changes to the UI:
- Add trailing space after title
- Make dividing line after task table header a single line
### Testing Instructions
<img width="776" alt="Screenshot 2024-05-14 at 8 45 51 AM"
src="https://github.com/vercel/turbo/assets/4131117/27f414e0-4136-40f4-b840-91e45e20aff2">
