This PR styles the project share notification, so we're not staring a
red rectangle.

<img width="425" alt="Screenshot 2023-12-18 at 6 06 14 PM"
src="https://github.com/zed-industries/zed/assets/1486634/7ae9a2d3-d5d9-427c-9125-3a47df5f6a2f">

Release Notes:

- N/A