Add NLog to list

Author: philkra

README.md

@@ -10,6 +10,7 @@ ECS Logging - Common resources and issues for the language specific ECS loggers
   * [Monolog v2.x](https://github.com/elastic/ecs-logging-php/blob/master/docs/Monolog_v2.md)
 * [.NET](https://github.com/elastic/ecs-dotnet)
   * [Serilog](https://github.com/elastic/ecs-dotnet/tree/master/src/Elastic.CommonSchema.Serilog)
+  * [NLog](https://github.com/elastic/ecs-dotnet/tree/master/src/Elastic.CommonSchema.NLog)
 * [JavaScript](https://github.com/elastic/ecs-logging-js)
   * [Winston](https://github.com/elastic/ecs-logging-js/tree/master/loggers/winston)
   * [Morgan](https://github.com/elastic/ecs-logging-js/tree/master/loggers/morgan)
@@ -23,4 +24,4 @@ ECS Logging - Common resources and issues for the language specific ECS loggers
 ## Benchmarking
 
 * [.NET](https://github.com/elastic/ecs-dotnet)
-  * [BenchmarkDotNet Exporter](https://github.com/elastic/ecs-dotnet/tree/master/src/Elastic.CommonSchema.BenchmarkDotNetExporter)
+  * [BenchmarkDotNet Exporter](https://github.com/elastic/ecs-dotnet/tree/master/src/Elastic.CommonSchema.BenchmarkDotNetExporter)