### Is your feature request related to a problem? Please describe.

Currently, conversion of HDR AVIF to JXR fails to retain correct luminosity.

To reproduce:

1. Export an HDR AVIF with the Technology Preview mode in recent versions of Adobe Camera Raw (I can provide samples of my own photos if necessary, or grab some from https://gregbenzphotography.com/hdr/). These can currently be viewed correctly with Google Chrome and edited with Krita (with some issues on re-save perhaps)
1. Attempt to convert, e.g. `magick filename.avif filename.jxr`
1. Observe that the resulting JXR does not render correctly in Microsoft Photos (as of version 2023.11050.16005.0) despite Photos having support for HDR JXR viewing.

### Describe the solution you'd like

`magick filename.avif filename.jxr` should produce usable JXR's, ideally with no non-default command line options

### Describe alternatives you've considered

_No response_

### Additional context

Current Windows Insider Preview builds support HDR desktop wallpaper, but apparently only from JXR, so this sure would be nice!
HDR AVIF to JXR conversion
This is a GitHub Issue
repo:ImageMagick
owner:ImageMagick
Title : HDR AVIF to JXR conversion
Issue date:

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### Is your feature request related to a problem? Please describe.

Currently, conversion of HDR AVIF to JXR fails to retain correct luminosity.

To reproduce:

1. Export an HDR AVIF with the Technology Preview mode in recent versions of Adobe Camera Raw (I can provide samples of my own photos if necessary, or grab some from https://gregbenzphotography.com/hdr/). These can currently be viewed correctly with Google Chrome and edited with Krita (with some issues on re-save perhaps)
1. Attempt to convert, e.g. `magick filename.avif filename.jxr`
1. Observe that the resulting JXR does not render correctly in Microsoft Photos (as of version 2023.11050.16005.0) despite Photos having support for HDR JXR viewing.

### Describe the solution you'd like

`magick filename.avif filename.jxr` should produce usable JXR's, ideally with no non-default command line options

### Describe alternatives you've considered

_No response_

### Additional context

Current Windows Insider Preview builds support HDR desktop wallpaper, but apparently only from JXR, so this sure would be nice!
--- end body ---

None