Invalid type rendering for <script type="application/ld+json"> renders as type="application/ld&#x2B;json"

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Describe the bug

In an `ASP.NET Core MVC app` on `.NET 9` the `script` tag `type` invalid renderers a `backslash+`

```xml

{}

```

Is rendered as

```xml

  {}

```

See screenshot below.


It works correct on `NET8`

### Expected Behavior

_No response_

### Steps To Reproduce

This should be the output

```xml

{}

```

### Exceptions (if any)

_No response_

### .NET Version

_No response_

### Anything else?

_No response_