Use GetAsync to get headers for stream type check

src/Jellyfin.LiveTv/TunerHosts/M3UTunerHost.cs

@@ -102,9 +102,8 @@ namespace Jellyfin.LiveTv.TunerHosts
                 {
                     try
                     {
-                        using var message = new HttpRequestMessage(HttpMethod.Head, mediaSource.Path);
                         using var response = await _httpClientFactory.CreateClient(NamedClient.Default)
-                            .SendAsync(message, cancellationToken)
+                            .GetAsync(mediaSource.Path, HttpCompletionOption.ResponseHeadersRead, cancellationToken)
                             .ConfigureAwait(false);
 
                         if (response.IsSuccessStatusCode)