`^` char breaks URL parsing

### Apache NetBeans version

Apache NetBeans 18

### What happened

Remote CSS is not shown if its url contains a `^`

### How to reproduce

Add this to an html page:
```html

```

### Did this work correctly in an earlier version?

No / Don't know

### Operating System

Windows 10 version 10.0 running on amd64; Cp1252; it_IT (nb)

### JDK

11.0.17; OpenJDK 64-Bit Server VM 11.0.17+8

### Apache NetBeans packaging

Apache NetBeans binary zip

### Anything else

stack trace

SEVERE [org.openide.util.RequestProcessor]: Error in RequestProcessor org.netbeans.modules.navigator.NavigatorController$1

java.net.URISyntaxException: Illegal character in path at index 28: https://unpkg.com/primeflex@^3/primeflex.css

	at java.base/java.net.URI$Parser.fail(URI.java:2913)

	at java.base/java.net.URI$Parser.checkChars(URI.java:3084)

	at java.base/java.net.URI$Parser.parseHierarchical(URI.java:3166)

	at java.base/java.net.URI$Parser.parse(URI.java:3114)

	at java.base/java.net.URI.(URI.java:600)

	at java.base/java.net.URL.toURI(URL.java:1061)

	at org.openide.filesystems.FileObject.toURI(FileObject.java:1270)

Caused: java.lang.IllegalStateException

	at org.openide.filesystems.FileObject.toURI(FileObject.java:1275)

	at org.netbeans.modules.navigator.ProviderRegistry.getProviders(ProviderRegistry.java:98)

	at org.netbeans.modules.navigator.NavigatorController.obtainProviders(NavigatorController.java:593)

	at org.netbeans.modules.navigator.NavigatorController.access$200(NavigatorController.java:76)

	at org.netbeans.modules.navigator.NavigatorController$1.run(NavigatorController.java:391)

	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1419)

	at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)

	at org.openide.util.lookup.Lookups.executeWith(Lookups.java:287)

[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2034)

### Are you willing to submit a pull request?

No

Reproduce the issue with the provided HTML link, then read org.netbeans.modules.navigator.ProviderRegistry.getProviders and the FileObject.toURI stack-trace path. Done means the remote CSS URL containing ^ no longer causes the URI parsing failure and the stylesheet is shown.

Written by the indexing model from the issue text.