jQuery.ajax doesn’t send headers when ‘dataType‘ is ‘script’ and ‘crossDomain’ is true

In the following example, while the same `headers` setting is used for all four requests, the header is only sent in the first three requests, it is not sent in the fourth request:

```javascript
const page = 
`<html>
<head>
	<script src='https://code.jquery.com/jquery-3.6.1.min.js'></script>
</head>
<body>
	<script>
		var headers = { 'X-Test-Header': 'Test-Header-Value' };
		$.ajax('Request_1', { dataType: 'html', headers: headers });
		$.ajax('Request_2', { dataType: 'html', crossDomain: true, headers: headers });
		$.ajax('Request_3', { dataType: 'script', headers: headers });
		$.ajax('Request_4', { dataType: 'script', crossDomain: true, headers: headers });
	</script>
</body>
</html>`;
const express = require('express')();
express.get('/', (request, response) => { response.send(page); });
express.get(/^\/Request_[1-4]$/, (request, response) => {
	console.log(`${request.path}: ${request.get('X-Test-Header')}`);
	response.send(''); });
express.listen(9000);
```

The server logs:

```
/Request_1: Test-Header-Value
/Request_2: Test-Header-Value
/Request_3: Test-Header-Value
/Request_4: undefined
```

Shouldn’t the header also be sent in the fourth request?

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jQuery.ajax doesn’t send headers when ‘dataType‘ is ‘script’ and ‘crossDomain’ is true #5142

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jQuery.ajax doesn’t send headers when ‘dataType‘ is ‘script’ and ‘crossDomain’ is true #5142

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