add disposal docs

Jellyfin.Api/Controllers/LiveTvController.cs

@@ -1071,6 +1071,7 @@ namespace Jellyfin.Api.Controllers
         {
             var client = _httpClientFactory.CreateClient();
             // https://json.schedulesdirect.org/20141201/available/countries
+            // Can't dispose the response as it's required up the call chain.
             var response = await client.GetAsync("https://json.schedulesdirect.org/20141201/available/countries")
                 .ConfigureAwait(false);
 

Jellyfin.Api/Helpers/FileStreamResponseHelpers.cs

@@ -36,6 +36,7 @@ namespace Jellyfin.Api.Helpers
                 httpClient.DefaultRequestHeaders.Add(HeaderNames.UserAgent, useragent);
             }
 
+            // Can't dispose the response as it's required up the call chain.
             var response = await httpClient.GetAsync(state.MediaPath).ConfigureAwait(false);
             var contentType = response.Content.Headers.ContentType.ToString();