fix: fix ai button aspect ratio (#4574)

## Description

AI Button  in the AI toolbar got into elliptic shape by accident

## Steps for reproduction

1. click button
2. expect xyz

## Code Review

- [ ] hi @kof, I need you to do
  - conceptual review (architecture, feature-correctness)
  - detailed review (read every line)
  - test it on preview

## Before requesting a review

- [ ] made a self-review
- [ ] added inline comments where things may be not obvious (the "why",
not "what")

## Before merging

- [ ] tested locally and on preview environment (preview dev login:
0000)
- [ ] updated [test
cases](https://github.com/webstudio-is/webstudio/blob/main/apps/builder/docs/test-cases.md)
document
- [ ] added tests
- [ ] if any new env variables are added, added them to `.env` file

Author: kof

packages/design-system/src/components/ai-command-bar/command-bar-button.tsx

@@ -6,7 +6,7 @@ type CommandButtonProps = ComponentProps<typeof Button>;
 
 const RoundedButton = styled(Button, {
   borderRadius: theme.borderRadius["pill"],
-  width: "min-content",
+  aspectRatio: "1",
 });
 
 export const CommandBarButton = forwardRef(