Fix ArgumentNullException while scanning music
```
[2024-07-16 18:00:20.517 +02:00] [ERR] [65] MediaBrowser.Providers.Music.AudioMetadataService: Error in "Probe Provider"
System.ArgumentNullException: Value cannot be null. (Parameter 'value')
at System.ArgumentNullException.Throw(String paramName)
at System.ArgumentNullException.ThrowIfNull(Object argument, String paramName)
at System.ArgumentException.ThrowNullOrEmptyException(String argument, String paramName)
at MediaBrowser.Model.Entities.ProviderIdsExtensions.SetProviderId(IHasProviderIds instance, String name, String value) in /home/loma/dev/jellyfin/MediaBrowser.Model/Entities/ProviderIdsExtensions.cs:line 121
at MediaBrowser.Model.Entities.ProviderIdsExtensions.SetProviderId(IHasProviderIds instance, MetadataProvider provider, String value) in /home/loma/dev/jellyfin/MediaBrowser.Model/Entities/ProviderIdsExtensions.cs:line 151
at MediaBrowser.MediaEncoding.Probing.ProbeResultNormalizer.SetAudioInfoFromTags(MediaInfo audio, Dictionary`2 tags) in /home/loma/dev/jellyfin/MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs:line 1322
at MediaBrowser.MediaEncoding.Probing.ProbeResultNormalizer.GetMediaInfo(InternalMediaInfoResult data, Nullable`1 videoType, Boolean isAudio, String path, MediaProtocol protocol) in /home/loma/dev/jellyfin/MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs:line 199
```
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