add comment follow up

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/Implementation/ExportClient/BaseOtlpHttpExportClient.cs

@@ -38,6 +38,9 @@ protected BaseOtlpHttpExportClient(OtlpExporterOptions options, HttpClient httpC
     /// <inheritdoc/>
     public ExportClientResponse SendExportRequest(TRequest request, CancellationToken cancellationToken = default)
     {
+        // Using this.HttpClient.Timeout.TotalMilliseconds here as the client can be configured by the user
+        // in this case the timeout set within the client will take precedence over timeout set via otlpexporter options
+        // the value will also match the timeout set via options when the client is NOT provided by the user.
         DateTime deadline = DateTime.UtcNow.AddMilliseconds(this.HttpClient.Timeout.TotalMilliseconds);
         try
         {