Fix missing ConfigureAwait (#13139)

Regression from #12940

MediaBrowser.Providers/Manager/ProviderManager.cs

@@ -262,7 +262,7 @@ namespace MediaBrowser.Providers.Manager
             try
             {
                 var fileStream = AsyncFile.OpenRead(source);
-                await new ImageSaver(_configurationManager, _libraryMonitor, _fileSystem, _logger).SaveImage(item, fileStream, mimeType, type, imageIndex, saveLocallyWithMedia, cancellationToken);
+                await new ImageSaver(_configurationManager, _libraryMonitor, _fileSystem, _logger).SaveImage(item, fileStream, mimeType, type, imageIndex, saveLocallyWithMedia, cancellationToken).ConfigureAwait(false);
             }
             finally
             {