Move declaration closer to usage

MediaBrowser.Providers/MediaInfo/AudioFileProber.cs

@@ -107,7 +107,6 @@ namespace MediaBrowser.Providers.MediaInfo
 
             if (libraryOptions.EnableLUFSScan)
             {
-                string output;
                 using (var process = new Process()
                 {
                     StartInfo = new ProcessStartInfo
@@ -131,7 +130,7 @@ namespace MediaBrowser.Providers.MediaInfo
                     }
 
                     using var reader = process.StandardError;
-                    output = await reader.ReadToEndAsync(cancellationToken).ConfigureAwait(false);
+                    var output = await reader.ReadToEndAsync(cancellationToken).ConfigureAwait(false);
                     cancellationToken.ThrowIfCancellationRequested();
                     MatchCollection split = LUFSRegex().Matches(output);