[Bugfix] Report transcoding complete

Currently, when transcoding finishes it is not reported - leaving the UI with an incomplete transcode %
This change reports transcoding progress as empty / complete when the transcoding job finishes

Jellyfin.Api/Helpers/TranscodingJobHelper.cs

@@ -753,6 +753,8 @@ namespace Jellyfin.Api.Helpers
             job.HasExited = true;
             job.ExitCode = process.ExitCode;
 
+            ReportTranscodingProgress(job, state, null, null, null, null, null);
+
             _logger.LogDebug("Disposing stream resources");
             state.Dispose();