update as per suggestion

Co-Authored-By: Vasily <JustAMan@users.noreply.github.com>

MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs

@@ -424,7 +424,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
             if (string.Equals(codec, "aac", StringComparison.OrdinalIgnoreCase))
             {
-                // Prefer to use libfdk_aac for better audio quality while using the custom build FFmpeg
+                // Use libfdk_aac for better audio quality if using custom build of FFmpeg which has fdk_aac support
                 if (_mediaEncoder.SupportsEncoder("libfdk_aac"))
                 {
                     return "libfdk_aac";