[Bug]: Function curl_close() is deprecated since 8.5, as it has no effect since PHP 8.0

### What happened?

Line `240` in `/src/HttpClient/CurlClient.php` the `curl_close()` function is used.  
It throws the above error since PHP 8.5.

### Relevant code or error output

```php

```

### SDK version

0.1.4

### PHP version

8.5

### Framework or runtime

none

### Operating system

_No response_

### Additional context

_No response_