Fix the alignment of the assistant (#3925)

![CleanShot 2024-01-05 at 17 30
11@2x](https://github.com/zed-industries/zed/assets/1789/b70226d0-bc07-4ce3-b45d-c25aace998c2)

Release Notes:

- Fixed the alignment of the assistant headers and text
- Increased the left padding on the assistant.
3d1f522566Nathan Sobo committed on 1/6/2024, 12:51:44 AM· committed by GitHubparents621c98baaada7d
2 files changedLine totals unavailable