Don't block automatic rounding of edges of installer window in Windows 11

### Please answer the following questions for yourself before submitting an issue.

- [X] I am running the latest version
- [X] I checked the documentation and found no answer
- [X] I checked to make sure that this issue has not already been filed

### AdGuard VPN version

2.1.1 (981)

### Operating mode

None

### Environment

```markdown
- OS: Windows 11 v. 22H2
- Other network-level software: N/A
```

### Issue Details

Steps to reproduce:
1. Download AdGuard VPN installer
2. Open it

### Expected Behavior

Installer window edges are automatically rounded in Windows 11.

### Actual Behavior

Installer window edges are automatically unrounded in Windows 11.

### Screenshots

Screenshot 1:


### Additional Information

_No response_